Kris--Don't go to much trouble--My backup plan is to go with the OS mini OB when they are back in stock for a 3S setup on the Baby Bullet. If I use your great lower unit mod with a 3s lipo and a seaking 120a v3 esc that I have what motor, battery mah would you suggest? Smallest X prop with 3/16 shaft is an X437 which could be cut down to 32 to 34 mm dia. Are there any other small props that might work? Wish I knew more about FE setups. How's the M11 Dragon? Ray