let me also clarify, I will be using Li-Po's for reciever and ignition, but 910 mah li-po's, swapped out every flight. Because of that I will use 1 switch (ignition), but need one V-regulator. 4.5 oz total in power supplies, 5 2 oz servos and one .5 oz servo (for throttle) 1.5 oz reciever about 3 oz in extensions 62 oz total engine, ignition, muffler and standoffs. Which is 5 lbs 1 oz or so. My plane weighed in at 12 lbs out of the box before any mod which would put me at 17 lbs, before CF landing gear, tail gear, wing tube and tail tube. Then add prop for 5 oz. We'll say I'm at 17.5 lbs, then subract wheel pants and difference for CF equipment. Wheel pants 4 oz and conservitive 8 oz for CF stuff and I am at 16.75. Hopefully all comes out as calculated, unless I am missing something major.