I just got a look at the TB last night that D Davis sent me. There are three
HUGE edges that need to be removed, even worse edges than on the Duratec TB's, SVT or non. I'll take some pics and post them after I work on the TB tomorrow night to show before and after.
Optimized BNM TB's are not polished to a shine. They are left with light grit 45 degree (as close as I can get by hand) sanding roll marks. Polished to a mirror shine is to old school and is not used by many people any more. Removing objects that cause turbulence to bring air speed and density sure as heck is though...
Focus TB's are not swapable with the Contour TB's. Totally different set up from what I've seen.