That really unshrouds that side a lot... Do you ever remove that little ridge just outside where the valve seat meets the chamber? Weingartner always talks how it helps get a little flow
If you look in the pictures with the valves that lip was hit some with my burr. Honestly that’s all it needs but if I find a tapered sanding roll I hit a few spots when I do the final
Valve job. I use almost zero sanding rolls any more but I should buy some of those tapered rolls. I have boxes of SA sanding rolls. I must have thought I was going to live forever. Lol