SolidWorks Enclosure Waterproofing Upgrade -- 3

I have an existing SolidWorks assembly whose enclosure needs a focused waterproofing upgrade so we can confidently meet IP-67/68. The case is already complete, but needs this new revision. Everything else in the model stays untouched, and it's crucial that your experience includes proven success with IP-67/68 compliance testing. Your task is limited to refining seals, joints, and any related features on the housing so water-ingress tests at 1 m / 30 min are passed without compromising the current internal layout.

You will receive the native SLDPRT/SLDASM files along with STL references. Update o-ring grooves, gasket seats, screw bosses, and vent details as required, keeping draft angles and tooling considerations intact for injection-moulded plastic. No dimensional shifts to all around enclosure, symbols, PCBs, batteries, or external mounting points are allowed.

Deliverables:
• Revised SolidWorks files (2025) and matching STEP exports
• A brief design note summarizing the sealing strategy, gasket or o-ring specs, and any material or finish recommendations
• Confirmation that clearances, drafts, and wall-thicknesses remain mould-ready

Acceptance will be based on:
1. Model opens error-free in SolidWorks 2025
2. Updated enclosure passes IP-67/68 criteria in simulation or design review
3. No new clashes or DFM issues introduced

Target turnaround: 3 days from kickoff. If you have proven success waterproofing small electronics enclosures with IP-67/68 compliance testing, please include examples in your reply.