RE: ESM 74
I started out with the CG at 120mm (4.7 in), measured at the point on the wing shown in the manual. By about flight 40, I had moved the CG backwards to 127mm (5.0 in). Got about 70 flights on my ESM Corsair now.
If I remember right, there are folks on those two threads that set CG's from 4" to 5.1". Most of them seem to be happy with the results.
Brian