Francesco helped us out with some simulations on the MAXA. This an excerpt from his findings.
"From my simulations it looks like it's a close match between 4 degrees and 6 degrees for the min sink setting. I don't consider the absolute sink rate value to be much significant, because XFLR5 doesn't estimate parasitic and interference drag, but just for the records it predicts it at 22 cm/s for a Maxa 4 at 1750 grams.
"I decided for comparison to analyze the Maxa at the same static margin, 8%, as my Supra, giveing a CG at 112 mm for MAXA.
More to follow and will be posted on our web site.