The last time I saw one of those was way back in the 'sixties', when I was conscripted (slave) lobor working in my uncles WOOD working shop, making cabinets and the like! One never knows what a clever use a crafty mind will conjure up for a given tool! ;)

On my latest HBR rig, I made a 'tuning' screw dealything -about mid way on the action and opposite the loading port -  ya just screw the thingy deal in/out and keep the windage near perfect! BIG MIKE says, "It beats holding off"! Well, assuming he can bring his KTI rating up to par, it might work on Al's rifles! ;)

Seriously, Stan, thank you for another good how-to overview!Keep 'em ON the X! R.G.