Years ago there was a kit offered by Robbie Holman (Sp-?) to convert Avid factory straight floats into amphib floats. Not a lot of detailed info on this retrofit has been available... until now. Thanks to Jerry and Snaps for digging the info up and letting me post for the benefit of the Avid community.
 The reproductions may a bit tough to read. If you really, really, really need to see the fine detail, PM me your email and I'll send you a copy of the hi-rez originals.