Peter has sent me some pics of his Al Byrne shaped extreme channel bottom Hot Stuff thruster that he tells me was one of Rabbit's personal boards with -RB 5'10" written on the stringer. Although considered a sanders and glassers nightmare, the channel bottom laid the foundation for the concaves we ride today.
Co-incidentally there have been a couple of interesting US made Hot Stuff boards come up recently.
This lovely bold yellow US made 6'0" single fin has seen better days but I'm yet to see a better channel bottom. Shaper unknown.
This US Hot Stuff thruster was shaped by Tom Eberly of Lightning Bolt fame, also glassed at West Coast Glassing.
You cant beat an 80's Gold Coast spray job on an Al B Hot Stuff shape.
Speaking of Al Bryne channel bottom, which we where, here's a few more from the shed to give you sanders nightmares.