I have it and haven't had any problem with it marking the surface. The rod
actually goes in the groove, not on the knurled face. Get it, you need
it...

"mclorson" wrote in message
oups.com...
Thanks Emmo, that makes a lot of sense. I looked at the HF ring roller
today. The mandrels are knarled. Does that mark that stock? I
wouldn't want to have 60" of curved 1/4" stock marked to the extent I'd
have to grind it back to get a smooth appearence. Anyone had experience
with that device? Thanks everyone for all the help so far.
-Mike