zephyr9900, I have several of the Valenite Metal Master cutters as well (different sizes/number of cutters). I also purchased the TTS conversion kits but was planning on manufacturing a ring with a slope on the inside to match the slope on the cutter head. Then the TS ring could sit on top of this. I hadn't even thought of modifying the cutter itself but that actually looks like the better way to go (fewer parts and less chance for errors creeping in). It doesn't look like you took off very much metal so I can't imagine it effecting cutter performance/rigidity at all. Good idea.