My heavyweight engine pushes the weight limitations on a model that size, so... I crafted my own landing gear wire from 5/32 music wire and bent it forewards so that half the front wheel extends past the leading edge. I haven't had any nose-over problems, but I fly from pavement. I usually take off from a 3-point stance to avoid knicking my 16" prop. There is a perfect engine for every airframe, and a 91 FS is perfect for the Chipmunk. Good Luck