I've never had a catch either and I've never heard of anyone else getting one....it's a theoretical only problem.
Like Mick, I'm also a Tormek owner, and they're expensive, way more than a Pro edge. I wrestled for some time justifying why I should buy yet another sharpening system when I already had the "Rolls Royce". One has a tendency to exaggerate potential problems and minimise potential solutions when one is clinging to the view that it's the best and only thing needed. I probably waited 2 years before I finally took the plunge, but having done so, it's virtually made the Tormek redundant, it's that much faster and less complex to use. The fact is that the Pro edge, for wood turners is a superior technology to wheel based systems because the design of the jig setting method is more efficient, coupled with the flexibility to use a wide range of abrasives as the grinding medium. I absolutely accept there is a theoretical risk of over heating, but again, in practice, it doesn't happen.
For my own situation, my primary goal in pursuit of a decent edge, is minimum fuss with the setup. To that end I've never replaced anything, they just become permanently setup with a dedicated grind which is one they do well. That way I have minimum setup time. My bench grinder does scrapers, the Tormek my fingernail grind on bowl and spindle gouges and the PE everything else including any/all shaping activity.
But for sure I've "let go" of the notion the Tormek is the best thing since sliced bread and for all new turners joining our club, we unanimously recommend the PE if budget allows. The PE gets brought to all club meets where turning takes place and any public open days because its simpler, faster, easier. No brainer really
