It's probably a bit late as there is a gap of about 3 years?

However, as far as the CG issue is concerned my (albeit limited) experience concurs with what Mamba said. I have a 78" CMP Edge 540 with an MT57 in it. With the CG at the most forward recommended position the plane was a complete dog!

After reading a few posts on this model I added some weight to the front and it was completely transformed.

Terry