Will post full reviews of both systems later, but just wanted to drop a note.
The Nova Vacuum Adaptor gets a thumbs down. It works in conjunction with the handwheel. Didn’t work with a shop vac, didn’t work with my vacuum pump. I spent all kinds of time making custom fittings for it. Still no go. The bearing is just too leaky. Maybe if I slathered the whole thing with some grease, but I am tired of messing with this thing.
The Hold Fast Universal Vacuum Adaptor gets a hearty thumbs up. I installed it, trimmed the headstock tube, and had over 25” of vacuum in about 15 minutes setup time.
-- David / Durham, NC