I was not happy with the curved rib 12 and not with the first trial to straighten it, so I came up with a better idea.
The first trial was using the shrinker and stretcher, but this leaves nasty tool marks.
Second option was a bead roller, inspired by this video.
I purchased a cheap manual bead roller with flat dies and installed it in a way the rib would not be obstructed:
And I ordered new ribs 12 from TAF and with the protection plastic on I used the bead roller until the rib was straight (it took 3-5 passed with adding the pressure a bit more on every next pass):
One rib ready, one to go:
Perfect straight without tool marks:
Deburring and priming next…