[tobnpr]

OK...

How did you determine the length of the front and rear pillars? Precision cut on a lathe?

I don't see how they could be out of alignment if you used the action screws to position them correctly.

You can remove the rear pillar with heat, it debonds epoxy. Take a soldering iron, place it into the pillar (alternating top and bottom) and keep applying heat as evenly as possible to the pillar. When the epoxy gets hot enough it will soften, then use a large punch (with the stock in a padded vise) to tap out the pillar.

Grind out the softened epoxy that was in place around the pillar before you re-do it...natch, you need to figure out where you went wrong?