...but the suffering was worth it indeed!
I finished testing my 16T. The result is good, however I didn't have a 12x6e on me. After playing with DCalc a bit, it looks like the 12x6e will perform similar to Manuel's 15/16T (page 5). APC 11x4.7sf looks even better if it can handle 7800RPM. I figured it looked like something worthy of a popular wind for this motor, so I wanted to share some 4-prop calcs with you all.
864Kv / Io = 1.92A / Rm = 0.0836 ohm
FWIW, I did end up getting true 4mm hardware. The 4mm nuts I got at Ace fit perfectly in the GWS HD hub socket. Also, my mechanics sounded pretty clean; not like a coffee grinder anyways.
ps: I included 2 pics for those in to motor pr0n. Perhaps there's enough room for 20.5awg?
...and that's no typo, it did pork up to 86gm with all that copper (includes nuts, washers, and connectors... no mount)!