Greyhawk I have only built a few forearms so my set-up is kind of crude . I purchased a drill that is .750 " and has a lead screw ahead of the cutter, that is perfect for the 1876 mag. tube with just a small amount of polishing after boring through . I did learn this , I bore the magazine hole then inlet the barrel channel by using the bored magazine hole as a guide for barrel inletting . Your set-up sounds like it would be a very accurate cut . I am making a forearm and butt stock now for another project a single shot Rolling Block .50 cal. oct. barrel , the wood is very hard , its Texas Mesquite burl / root stock . On this piece I have used a router and piece of angle iron for a guide to start the barrel channel , but finishing the cut with chisel and scrapers . I must admit working the wood down is enjoyable to me and I am in no hurry ( Therapy ) . I ran across this Shotgun butt 1876 stock and decided to fit it on my parts gun , looks good to me and feels great . Should finish the butt plate and final sanding then apply the stain and oil .The SGB fits with the short forearm and short rifle theme .I agree I am glad to see some of us still interested in the 1876 rifles .,,,DT