Did one tonight. This one is for a 24in wheel. It was a little tougher then I expected. I had to use a FAIR amount of strength. I got caught up with bending, so I didn't take to many pics. The first one is the fork in the conduit bender (doing a second bend). You have to bend in small increments, then CHECK to see how much more you need to do. I've heard people say that a conduit bender leaves "kinks', not if you don't try to go to far with a bend. If you need more of a bend, move it, slightly, up or down. I used two reference points, on the fork, for this bend. The first was with the drop outs sticking OUT of the bender, an inch. The second was the TIP of the drop outs flush (even) with the end of the bender, as shown. This wasn't a "radical" bend. I just wanted to change the attitude of the bike slightly. Remember, go in increments to achieve what you want, put it back on the bike and check. The more you bend, the higher the tire gets to the top of the fork. Bend to MUCH, and you won't get the rim back in! The last four pics show the progression of the forks. As far as measuring, you can see that I use the space in the boards of a picnic table bench.
GOOD LUCK! .....I hope this helps you out.