Classic 2 inch micro the X2 Elf. Adding 22mm aluminum standoffs to better fit the flight stack. This little bugger want to fly, pops off the ground with very little throttle on 2s 450 and 550mah batteries. Hell of a time getting it to fly right, had oscillations galore, ended up with custom motor mix and dropping all the PID's way down. Feels a little on the loose side right now, working on bringing the PIDs up a bit.