Ummm, The H9 Cap 73" has a worse tail heavy problem than the Creek planes. I actually crashed my H9 Cap due to tail-heaviness right after I moved the elevator servos rear; it flew great with the servos up front. Also, the H9 Cap is heavier, thus needs the Moki power.

Regarding the Creek planes: they are more docile even when they are tail heavy, compared to the H9 Cap. So if you can get the CG at 33% at center-of-lift, you should be fine.