Cool Cheech, I am at about 5 inches back on the cg. maybe 5 1/8 on those aggressive days. I went to 5 1/4 or so, and scared the poop outta myself several times, I dont know if I was just rusty, or it was a windy day (gusty, nothing steady). I am thinking of replacing my linkage with spiderwire, just to ease some binding. Like you said, it can be a lil sloppy in spots, tight in others.
Hook up flaperons, and on high rates, it will waterfall within a fuselength, repeatedly. As it starts to fall over to one side, counter with a lil rudder and aileron, and it will climb, in sort of a knife edge spin.
Blackie,
I unfortunately am not an owner of an Aeroworks Edge 540, but if someone would be willing to give me one, I definately wouldnt complain about it

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Steve