After fooling around with "eyeball bends" I came to the conclusion my eyeball wasn't very good. I'm a beliver of doing the math & laying out the marks correctly, much faster and, if you are doing multiple runs, then all bends look alike.

I prefer the no brainer 30 degree offset for bends up to about 6". Checkpoint makes a level that has a 30 degree bubble & the level has magnets that are strong enough so the level doesn't fall off the conduit.

Tom

Few things are harder to put up with than the annoyance of a good example.