Thanks - I actually ended up with the Actinium 17.5T, as I realised I would need the motor in the coming week of building - saw a lot of good comments about it, plus even more importantly my LHS strongly recommended it (will be able to help with any issues). Also it came in at "only" AUD110. TLR 33T/48P spur gear, TLR 70T/48P pinion. Looks good, too.
Sorry if that was a bit OT to the thread, but thanks for the advice, appreciate it. I will keep following the Gen 3 Tekin for my hopeful TLR22 V3 mod class build one day next year (I wish, at least). Also I still need the ESC which I left for later, allowing more time to research. Don't need it just yet.