With mine it's a love/hate relationship. Discs fly off....I found out if you reverse the "cupped" shape of the discs it helps. The sticky is great, but it's not infallible. The shafts must be perfectly straight or your taper will show it. I have no problem spinning the shaft in the groove, but a hidden bend of any amount at the very tips of the arrow shafts will be evident in your taper. A razor blade tool isn't affected by that.
Personally, I will defeat this devil. But I think I will find myself buying a decent disc/belt sander combo in the future and making a jig to taper point/nock ends. I need a feather grinding belt sander anyway. When I do, the woodchuck will be for sale with a disclaimer.
If you find a supplier of shafts that'll point/nock taper for you, that may be a less aggravating option.
I have thought of going straight cedar and getting the tru center taper tool v2. Doug fir does better with the Woodchuck or home disc sander and jig.
That's my experience and 2 cents.