Yep, I've done both HSS and carbide. Carbide is most convenient / quickest but I've never been happy with the finish - always looks a bit "chattery". I assume its a speed thing. Carbide is by far the most expensive route. I recently bought a kennemetal Left hand holder and inserts ($$) to try Joe Pie's method, video made a lot of sense. Results were kind of disappointing - I could indeed run faster, without fear of crashing - was up to 200 RPM. Finish was still poor though - cutting on the front side, running in reverse, tool upside down, it wanted to lift the (slightly loose) cross slide, causing the chatter. Gotta find a way to tighten that up.