Ok fellows: Andy Lennon's book, R/C Model AIRCRAFT DESIGN page 72-76 covers all of the info you need to locate the landing gear placement for converting in etiher way. The taildragger should have the landing gear at a 15 degree angle forward of the CG location, and the trike gear is a distance BACK at 5% MAC. The figure 5 page 74 shows the model with a 4-6% of MAC(cord). I have been converting most of my models to trike gear location for better ground handling, and takeoffs. Saying this may create a discussion, but I like the control issue with three large wheels on the ground, having one of them in front.

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retired A&P Mech
AMA410664