Can anybody recommend a book?
I'm after basics on design and use of the various rolls for different
stock - round and square tubes, etc.
I bought a manual roller, but only have a few rolls.
It is able to roll up to 10mm x 50mm flat bar, according to the brochure.
I've searched, but can't find much useful info.

Another query: To make complete circular rings, I assume I have to
partially coil the stock, then remove the straight portions before
flattening and welding?

Jordan