I suspect that Gil is trying to remachine stock heads to make the .46LA do 4-2-4 runs. It appears that there are no heads available from Tower Hobby, so he's doing the right thing, I think, but don't think the heads need rework. He probably did not consider making one stock head into a clamp and going to barstock "button heads". This is generally an easier way to do it, especially since the LA heads are such a silly exterior shape. Don't take any .40LA heads, Gil...the bolt pattern is smaller!
Steve