I own a kelton bowl saver, I do like it very much, I don't get to use
it as much as I would like to. I've also used the one made by wood-cut
tools. Both are nice, wood-cut doesn't have the versatility. Differen't
shapes, vase saves, and deep parting are keltons domain, even when
compared to the oneway version. The instructions suck to the point of
being wrong, Mike Mahoney's video made a difference. By all means, ask
away about either of the two systems I've used.