I believe that Loren Roberts does use a vertical hinge. The thing to remember is to match the path of the club head i.e. covering the plane line as opposed to tracing it. I prefer angled hinging with a push basic stroke because you do not have to think too much about executing a hinge action. But I also discovered that being "on purpose" is a good thing to i.e. settling your intent to execute this or that!
Okie,
Intention is a good thing. I haven't made a putt in 5 rounds now and I think I've drifted into too much of a "just-let-it-happen" mode with my stroke and my mind-set. It'll be interesting to see how some "VH with intention" works this weekend.
(I always wondered how Roberts was such a great putter with such a unique-looking stroke. Simply another TGM catalogued pattern. Homer Kelly is so under-rated. Do we truly appreciate his body of work and the effort he put into it?).