Hey there LongRange,
Thats exactly what I was hoping to see. I prefer "free recoil" and the slanted underside of my factory stock just rides the slope down each shot instead of recoiling in a more linear direction like a flat bottom aftermarket stock would.
Having done exactly what I was hoping could be done, how did you set out to get the middle pillar height and location set? The way I would do it is to attach it to the action (with a spacer so that the pillar would set slightly deeper than needed) and then set the action down in to the stock thus sinking the pillar in to the filling material. Is that somewhat close to the way you did it?