Conversion of the Mustage Kit:
Remove the fins and launch lug. Cut off the top of the body tube so that the length is 14-1/8".

Building the RamJet:
Cut the 10.5mm body tube to a length of 11". Then mark it on each side the length of the body tube. Cut tube in half lengthwise. (save the other half for the Dorsal Conduit) Take the plastic 10.5mm nose cone and mark it using the halved body tube, then cut it in half lengthwise. The total length for the RamJet support is 12-1/2".

Cut each of the (5) vanes of the RamJet from the basswood strips. Following the SLAT/s instructions, cut and sand each vane into the proper shape. Then glue each one onto the 10.5mm body tube making sure the back of the vane is even with the back of the tube. Also each vane edge that attached to the 10.5mm tube should be touching the one next to it.

Cut the Icarus body tube to a length of 10-3/4".

Once dry, lay this assembly onto the Mustang body tube so that it is hanging off the back. Slide the Icarus body tube over it until it hits the back of the Mustang body tube. Mark where they meet on the Icarus tube. Extend those lines on the Icarus tube and then cut through them lengthwise. Don't use an enlarged guide for these two cuts. You want to make sure that the Icarus tube fits nicely around the vanes and meets with the main body tube.

Next, you will need to cut out the front shape of the RamJet using a template. I made my template by going to a copier machine and enlarging the "RamJet Tube Marking Guide" x 1.9x. Then on the front (following the SLAT/s instructions) cut 1.5" lengthwise and 1/4" from the edge to form the front of the RamJet.

Mark the Mustang body tube, using an enlarged "Body Tube Marking Guide" and a door jam. Glue the RamJet Vane Assembly and nose cone onto the Mustage body tube using this line as a guide (leave 1/4" from the rear of the rocket). Then glue the Icarus body tube into place on the vanes and the Mustang body tube.

Building the Dorsal Conduit:
Take the other half of the 10.5mm body tube that was cut in half lengthwise and cut it to a length of 8-1/4". Take the 10.5mm balsa nose cone and mark it using the halved body tube, then cut it in half lengthwise. Take some sandpaper and attach it to the Mustang body tube. Rub the nose cone halves on that sandpaper to form them to the body tube. Glue the tube and both halves of the nose cone onto the Mustang body tube on the exact opposite side (follow instructions) of the RamJet. The tip of one nose cone should just be shy of the top of the body tube (where the nose cone fits). The total length for the Dorsal Conduit is 10-3/4".

Build the Fin Assembly:
After carefully cutting the balsa parts from the original SLAT/s sheets, I took the empty sheets to the copy machine. I then used the enlarge button until I had the correct length on the copy. (Pod base to 5-5/8" for a reference). This became my template to cut out the balsa pieces for the upscale.

Follow the SLAT/s instructions for building the pods. After building the pods, take some sandpaper and attach it to the Mustang body tube. Rub the pods on that sandpaper to form the edge that will be glued to the body tube.

Finish assembly of the fins and then glue each one onto the Mustage body tube so that they are touching the edge of the RamJet and so that they are aligned as indicated in the SLAT/s instructions.

Finish or . . .
At this point, you could finish the rocket out by attaching the parachute and recovery system to the nose cone. Then add enough nose cone wait to make the Center of Gravity is equal to 12 3/4" from the nose cone w/o the motor. (never more that 14-1/2" with a motor).

. . . Beyond:
In my case, I decided to add dual deployment and an electronics bay. This may seem impossible with the length and diameter of this rocket but just let your imagination go for a minute.

Prepping the Nose Cone:
First you will have to cut out the very bottom of the nose cone, just above the round in the shoulder (the shoulder should still have 15/16" of material left). Next tie 2' of 3/16" Kevlar® to an eye-bolt (the one I used had an 1/2" eye and was about 2" in length). Then take a file or small screw driver and scratch up the inside of the nose cone tip about 2" from the tip. Then get a large glass of water with some ice in it. Put the nose cone into the glass of water so that the open in facing up and support it there. Hang the eye-bolt into the nose cone so that is it all the way in and touching the tip and yet still straight up and down. Then mix up some 30 minute epoxy and drip it into the nose cone until it reaches the eye-bolt. Keep adding it until the bottom of the eye-bolt is just submerged that way it will form a "bridge" through the eye-bolt. (Note: I don't know if it is necessary to submerge in cold water, however, I didn't want any heat reaction of the epoxy curing to melt the nose cone).

Building the Electronics Bay:
To create the Electronics Bay you will need a 5" piece of tubing (I used a nice 38mm motor tube since it is thick). This will need to be sized by cutting a strip out of it lengthwise until when held together it is a snug fit into the nose cone (You'll want 1-3/4" to fit into the nose cone). Once the fit is right, glue the seam together and also place a thin paper strip on the inside of the tube for strength. Then soak the section of the tube that will extend into the nose cone with CA. Sand it. Soak it. Sand it. Soak it. Sand it until it is smooth, strong and fits snug into the nose cone. This fit will need to hold together at the apogee deployment since the nose cone will contain the main parachute.

Once the tube is sized and fits right, then a wooden bulkhead will need to be glued onto the top (section that slides into the nose cone). I used a wooden bulk head and a 1.16" thick, 1-1/2" washer on the inside of the tube. I had to use my dremel to size the washer correctly. Drill a hole in the center and mount an large eye-bolt. I used one with a 1" eye, 1/4" thread, and a total length of 2-1/4", along with two hex nuts, one for each size. Don't worry you need the weight. Tie a 40" long elastic shock cord to the eye-bolt on the Electronics Bay and to the Kevlar® coming from inside the nose cone. I used Aerotech's elastic.