Yup, that type is not so critical...I'd shoot for gear that give the longest prop you will likely use about 2" of clearance in a level attitude (to keep it out of the grass) and place the AXLES even with the leading edge of the wing or perhaps just a touch forward of that.

Highplains, you make an excellent point ref the difference between balance point and CG. Unfortunately, the term CG is a universally misused one. Fortunately, that's alsmost never an issue.