He sold the rights for the heads to MDS and still manufactures them if I am not mistaken. I have used a lot of his products none ended in anything sub-par. Some had some issues with his 910 kits, and some love them, just like a lot of other performance shops we see. Their was a some issues with a competitor where that competitor threatened to sue, so Brad ceased with making that product and most of the more affordable PAR products along with them. He still builds some bad *** customs and engines for people and has a personal Pro based billet triple coming out I can't wait to see. Not to long ago I called him on some parts and he was still willing to get them to me.
To the stretch to fit comment and patent infringement. The one thing I have realized working in a couple Snowmobile performance parts manufactures is, they all copy each other.