RE: Semisane's LOL Aperture Signt
That is a great peice of creative engineering there. One thing you might want to consider is changing the modified nut out for one with the same thread pitch as the Lyman peep, then you could buy off the shelf peep inserts like the adjustable aperature rear peep for instant versatility. Of course that would increase the cost. You could still make your own as you did but with the Lyman size bolts instead of 1/2". Just a thought.