One observation... the cap screws are not shouldered, they're all thread... running loose will shear at the threads, and over torqued can shear the head of the screw.. what it needs is a shouldered cap screw, and part of the shoulder should recess into the rod big end, so there is no shear loads put on the threads of the cap screws.
Last edited by John_M_; 08-23-2022 at 07:16 AM.