With a taildragger the fore and aft positioning is critical and Mike109 is right on when to far forward the airplane will become what I call a boinger during a landings .. The perfect placement in terms of easy to land is eactly at the CG. I actually have flown some early full scale gliders like that and what butter cups they were. Virtually all modern full scale gliders are now taildraggers. This of couse presents us with the problem of keeping the propellor off the ground so its necessary to put it forward a bit as Mike suggested with the wheels center footprint somewhere around the leading edge of the wing.

It can be to your advantage if you use a bolted gear to actually use several bolt holes on the gear plate to have several sets of hole about a quarterinch apart for some adjustment. There is a another way to make fore and aft adjustment at the axles that I will show a picture of later after my trip to the field if any interest.

John