Are these frames (steel/aluminum) undesireable? Or to phrase it differently-a technology that didn't go over? Dated them to 91. Other than a pic here or there on the web (asking for info as well) I haven't found much on them. Anything labeled pro can't be all bad (lol) Seller will go 100 for both-and I can do the work myself. Not flippers for me-they would be keepers.