I remember trying this before. It does work, but I found that
the bends were not crisp. The unsupported area had a gentle bend
and there was a sharper bend directly under the wedge. It also
marked up the work a lot as the piece slid into the hole.


Don't need to use a vee block. My commercial Handy-Bend HPB 120 uses
angles arranged thus (in ASCII art) in cross-section, base of the jack
on the top of the upper part:

-++-
||
--+ +--
| |
| |

Then the work goes in like this:

\ -++- /
\ || /
--+\__/+--
| |
| |

With this you just press enough to overcome spring-back, and you can do
more than 90 deg if need be.