OK this is how I view it.
1. The yellow 3 tooth TCT cutter is basically for cutting holes and not artisian type work that you and others do making wheels.
2. Its basically a very efficient hole cutter and designed for electricians.
When I say efficient I really mean it will almost pull you through the hole if you let it !
3. I know of a set sold by Trade tools and others no doubt.
4. Not the choice forĀ  precision woodworking, (unless you want to borrow my wheel sanding jig to finish the edges)
5. Now 6.0 or thereabouts EMC is OK when its up around 12 its getting critical.

Regards Rob