Well the HK (VQ models) SpaceWalker build went very well overall. There were a couple of issues, such as one wing being 10mm longer than the other, but other than that it was an easy build. We used an old ASP .61FS for power with an 12x6 APC style prop, and it seems plenty powerful.
The maiden flight required quite a bit of right trim, and was climbing strongly under power. It looks like the elevator is not centered properly, so that will need fixing before the next flight.
Additionally there may be some down trim required. Its quite a bit more aerobatic than expected, and nowhere near the easy flyer the Hobbyking Soar 40 is, but will make a good low wing advanced trainer.