A handy trick I've used for tight back to back bends:

A couple of galvanized plumbing elbows with a nipple between them and a short nipple to go into the bender head can be used to offset the handle. It takes a little practice, but works.

(I once got a job with a contractor whose trick was to ask applicants to bend an 18" back to back 90°. I bent a full circle this way. He was amazed [Linked Image] and hired me on the spot. )