walnut dowel came in yesterday, along with a trigger screw bushing. Dowel fits in just perfect with no alterations required to hole or dowel. The hole for the bushing is oversized and does not hold the bushing in the least, it falls out. It likely had one and fell out during first disassembly.
I'll get the dowel in and flush on all 3 sides with the stock, then final fit trigger guard inletting and flat behind the lug for magazine depth and upward bedding pressure at my repair, then trim trigger screw bushing to length (1/8" below wood as per chuck), and lock it in place with epoxy. Pics of progress to come over the holidays.