Have an Aresti 40 with a Saito 72 spinning an APC 13x6.

The listed CG locations seem very nose heavy. Has anyone experimented with moving the CG AFT?
Was thinking about going back to 4.0" behind the leading edge, instead of the plans 3.75".

Can bearly hold knife edge and takes about half down to fly inverted. As well as a dog to take off.

Also, on another note. When doing an avalanche, at the top, the engine seems like it wants to quit, any ideas?

Thanks in advance,

Glowfuel....