alot of old timer metal shapers on another forum been testing these out ... there input .. theyre crap ...
like Nate said , flexing frame and no flats on the anvils... this will leave marks in your metal for a novice ... the time you take re-building the frame and getting the right anvils , you could have built your own frame... yeah , you can roll metal , but with all the slop , your not going to get good results , or be working harder to get the right shape....
http://covell.biz/ he has some good kits for building your own wheel ...
or check out Hoosierpatterns at EBAY ...
good luck ..