i wouldnt worry to much about the landing gear, just hand launch it and grease is in. if it were mine, i wouldnt even put is on, just skin the underside of the fuse with light ply and belly it in. ive never seen a butterfly take off from the ground well.
thats what i have done. the Butterfly comes with a piece of ply for the first 7-8 inches of the belly, the rest is balsa. but i dont grease it at any level, i dont think its needed. im adding automotive wax to my BOT, but thats all im doing. normally after a day of several landings on the butterfly, there are just a few grass stains which wipe away pretty easy.
hand launches on the butterfly work pretty well, i normally have other pilots around me to help with that, its a bit awkward doing it on your own.