Dave, you can do a review of your friend's brake here. (but do a review, not just a 'buy his brakes' post.) You may include a link to his site.

You can also put his info in the classified section. (that can be in ad format.. no 'review' necessary)

When he becomes a famous muzzlebrake manufacturer.. he can pay us back here at HNI by donating a brake that we can raffle off for charity.