Another thing to consider ...I mounted the pillars to standoffs prior to epoxy...wrapped a couple wraps of tape at both ends of barrel to provide a free float clearance between barrel and forend when complete...set the barrel with epoxied pillars installed into the forend...taped the two together to hold in place until cured...make sure to put release agent, plummers putty in dovetails where needed (Johnson clear boot polish)...and plenty of epoxy where needed...good luck
Zen