BT70 Upscale of Centuri Vulcan with 7x18mm Motor Mount Construction began with the building of the 7x18mm motor mount from Fliskits meant for the BT70 tube. This was interesting in that normally, 7x18mm mounts will not fit in this tube without some deformation. Fliskits came up with an ingenious solution. At the end of each of the BT20 motor tubes, a coupler tube is inserted. These ...