Thermoquad mods that work.

Bewy said
Quite agree. That is what the above mods addressed: reducing flow restriction & turbulence. A by product might be an increase of a few cfm, but more cfm was not the primary aim.

The butt-meter will feel an immediate improvement with the above mod.

I believe removing the choke horn and smoothing the entry in that area will help contribute to improving the things I mentioned in my first post.

I’m not saying the mods you did do not work and are duly noted to things I will try.