this might be a little help, but on the 0.16 PartTools page, there's a quick tutorial mentioned for docking - 1. Create a box around your airlock in your modelling software 2. Load your stuff into unity 3. Add a unity tag named 'Airlock' and a layer named 'Part Triggers' 4. Assign the tag to your airlock and move it to the Part Triggers layer you just created 5. Use the new yet to be released parttools or devhax to export your part.