Self-Levelling Paddleboard Cup Holder

I need a precise STL design I can send straight to the printer for a plastic, paddle-board-style cup holder that stays level on choppy water. Picture a two-part system:

1. A low-profile baseplate with a male thread on top, a matching female thread recessed beneath, and a clear 1-inch void so my strap can pass cleanly through before it clicks into a buckle system.

2. A gimbal-style mount that screws into the base and keeps the upper cup cradle level. The cradle should comfortably fit a standard Starbucks cup and still allow room for typical travel-mug handles.

Please model tolerances for FDM printing (0.2 mm layer, 0.4 mm nozzle) and keep overhangs reasonable so I can print without exotic supports. Deliver the STL files separated by part, a quick exploded view or screenshot showing assembly order, and call-outs on any hardware (thread pitch, screw sizes) I’ll need. I’ll verify fit by sliding a 1-inch strap through the base and threading the two parts together; the cup must self-level through a 45° tilt in any direction without binding.