What’s the current state of the art of 1/4 shaft extensions? I’m partial to the running each shaft through the center of a lock bar then through a collar to the new shaft coupler. Repeat on the other side. Bolts pull the two lock bars together. The collars keep the shaft from pulling out of the shaft coupler (they pull against the lock bars). Since any length of 6/32 screws are allowed I now use the smaller screw to go next to the shaft to keep the area a little smaller.
But it’s been a few years since I needed to create a long shaft, what’s the latest setup? Anyone doing shaft extensions of the high strength shafts?