Re: Adjusting the bridge radius
That's what I thought you'd use. I haven't used them myself, but I assume they'd work as well as Rich's homemade ones - or you could make them yourself like Rich does. Maybe worth the purchase if you only need them to set up 1 or 2 guitars and can afford $10 (although I don't know about shipping to where you are might make it not worth the cost).
Rich sets up so many guitars, he'd have to spend a small fortune to purchase them at almost $1 per (allparts.com charges $10 for 12 of them) - he is smart to make them himself.