He's just put up part 1 of a new video on how to build your own tiltrotator for $1200, and he describes the Chinese component as an SE7 Rotator, and Googling that detail with Alibaba brings up a slew (sorry!) of rotators from $136+.
was watching someone's vid on using a ying tong rotator, to build with, a few weeks ago and he'd said he'd had it from them too, for $200US .... but unfortunately didn't provide a more specific link other than a general alibaba one

... have seen all sorts and sizes of cheapo rotators ... getting cheaper by the day too, as they're used for solar tracking for PV arrays ..... finding good
small rotary couplings, with four galleries, is the next problem ... the Roemheld I used is great, size wise, but horrendously expensive new
