http://www.ApogeeRockets.com - Wait to perform this step until after the rocket has been painted. The reason is to decrease the chances of the RCS nozzles breaking off during painting. The Reaction Control System (RCS) nozzles are shown in this step of the construction of the Apogee Components Saturn 1B model rocket kit. Because the parts are very small, you may find that using a pair of tweezers will help make assembly easier.