About half way in the landing gear section. i lined the area where the gear will be mounted (photos) with 3/16 ply and the landing blocks are halfinch ply.. after the location is set in stone , i'll gusset the blocks to the wing. ill post later. had a friend (on sight signs) print a outline of the real zero and matched up the location for the gear. the thin ply where the wheel is is for added strength just incase the gear slapps the top of the wing. i have about 3/16 clearance but you never know + its there for the fuse, thats where the fuse rides on the top on the wing.