Well I think the original short legs and small wheels don't even look that bad. They somehow match the slender fuselage.

The drag values are all guesswork. My estimate for the fuse is 0.0041 with the glow engine sticking out. The landing gear with 1" longer legs and 3" wheels makes for 0.0034 drag. Not much difference. (Drag values are square meters referring to dynamic pressure.) The Simla wing is draggy, but a low-drag wing (airfoil) would have even less drag than the thin fuse.