Played around with what I had this morning and came up with this. I had the flat stock cut to use for arms with the 6" radius block, but ran the block through the planer so now both blocks are the same thickness. No need for a separate lever, used that stock and added tabs from angle to the ends that pivot/engage the existing arms when pulled down for bending. I cut a piece of 3/4" pipe for a handle and it is used as a gauge on the distance between the lever arms for set up.
Bent some more 1/2" emt, way easier, probably over kill but I'll see how I like it with use(I have a cutoff wheel so easy to shorten). By using the bolts and all-thread it takes down quickly for flat storage. I know this is pretty rough compared to a lot of work here but its what I can do with what I have without putting a sh#tload of time in it. Major benefits: enjoy doing it, increasing fab skills.
Brian
remove the two outside nuts on the "axel" and the extension is released
scrap pipe and all-thread handle