Purchased the plans from Donatas last week (Only about an hour between payment and when the plans were in my inbox
). Since it'll be a while before it's comfortable to fly outside in these parts I put together a Mini SUltimate, scaled off of the plans. I used the Beast motor/battery, with the AR6400NBL that comes with the Micro Stryker. For servos I ended up replacing the Spektrum stuff with the HK5320 1.7g servos from Hobby King.
I really like this size/power combo. With a 22" wing and a 50-55g flying weight the wing loading works out to slightly less than the UMX extra. It feels like a full size indoor 3d plane, but it makes the space you're flying in seem much larger, as there are now more airplane lengths for a given hall size. I didn't mill this guy, so there are probably a few grams to squeeze out of the airframe.
Here's a video of John Glezellis wringing it out at the Auburn indoor.
and with it's big brother (me flying this time)
I love this design, and really look forward to building/flying the XL