About this 3D model

Derivative Work from Nophead's and Adrian's Pulleys Reason: Set Screw can come loose after long prints Cause Poor print quality. Happens In only My X Pulley, why? Three new Variations to Nophead's Pulley design.Added feature include:1) Solidworks History Tree2) Solidworks Assembly File3) Replaced M3 nut with Nylon Locking Nut (No more Locktight)4) Less Chance of Screw Slipping out5) Nut turned at 60 degrees for better holding strength (Not a plan 5.5mm X 2.5mm Rectangular extrusion hole)6) Direct Replacement for Nopheads Pulley7) Thee Flavors to choose fromA) Single Locknut PulleyB) Double Locknut Pulley___C) Single Locknut Pulley With overzied Locknut hole (experimental)