I have this slider-crank rig working but the circled joint between the "ROD" bone and the "PISTON" bone pulls apart a little bit as I rotate the "CRANK" bone away from PISTON. And the ROD bone pushes into the PISTON joint when CRANK is rotated towards PISTON.
ROD is parented to CRANK, and has "Track To" targeted to PISTON. PISTON is unparented, and has "Copy Location" targeted to ROD tail. And "Limit Location" on all axes except local Y.
Is there a way to make this joint behave more like a "connected" joint --- stable, with no movement?
Thank you very much for any assistance, Rob Blender 2.91.0