Is there a more aerobatically capable .60 sized bipe than the GOLDBERG ULTIMATE? Will your LAZY ACE, TIGER MOTH, PT 17, etc. knife edge loop, loncevak, flat spin and then land like a trainer? Check the specs on the "CG "bird. Incidence? We don't need no steenkin' incidence[>:]! All we need is light wing loading, lots of power, symetrical airfoils and a CG as far back as you can stand it. If I could play with any thing, it would be to have a way to remotely shift the planes' CG for different parts of the flight routine

If playing around with your particular birds' angles brings y'all more fun and enjoyment, that's all that really matters though. I do believe that no 2 different models [especially bipes], are created equal and no single set of "rules" could ever be made absolute to fit all cases.