In article ,
John Stumbles writes:

I think you'll find the former is a bit loose: if you find a bit of thin
(1mm - 2mm) metal and slip it between the former and the wheel it should
improve matters. Is your bender one of those turquoise colour ones (from
Screwfix or B&Q)? I had one and sent it back as I decided it was crap[1]
and bought a Hilmor from BES instead. I still occassionally get
wrinklies but it's the exception rather than the rule, whereas it was
the other way round with the other.

I've got a Record bender from B&Q, and in spite of heavy use,
I've never had a single wrinkly. :-}

--
Andrew Gabriel