Nick was asking about this in another post, and this is my modification on my handmade unicender. It requires a size 60 roller connecting link and two 3/16 inch holes 3/4" apart to fasten it to the "L" bracket. The size 60 roller link has 1/2" rollers with axle tension pins. You will need to press these out of the side link plates, then round over the edges of the side plates and one hole where one axle pin was. Then press one axle pin in place on one side plate that is not rounded. Fasten the side plate with axle to the "L" racket as pictured with a 3/16" rivet (countersink the opposite side with a .213 bit), so the rivet comes out flush. Then put the roller on the axle and press the other side plate in place. Finish by either riveting or using a 3/16" threaded bolt as pictured. A rivet would be better in my opinion, I just did not have a long reach rivet on hand. You will need about 2-1/2" from the spine rivet of the unicender to the innner edge of the "L" in order to have the proper clearance for the rope to slip on mid line.
