I have a 455 Tacticool version in Boyd's stock and recently picked up a synthetic American that I've decided to build on. I ordered the DIP scope base right away and, over the last couple of days, have now ordered a Boyd's AT-One stock in Coyote color with target grip and fore end. Got word today that it has shipped. Yesterday, after a long conversation with the nice folks at F.J. Federson in Laudon, TN I ordered one of their Varmint contour threaded barrels. Not sure what Im getting here but, hopefully, it will be a good one. Still working on what trigger to get but narrowed to a Mr. Fly or Timney. As someone who has been thru the "ball-bearing hell" before I don't want to deal with it again. Is the Mr. Fly a drop-in unit or require working with that damn ball-bearing?