I saw a lot of people trying to print a carabiner and it was a nice project to test my new FELIX Pro 1 printer. Besides, I wanted to figure out the distance between surfaces that need to stay separate. It turns out 0,2mm is so close the parts are more or less solidly welded together. This part has 0,5mm clearance and I feel it could be a bit less, especially for vertical surfaces. If you want, I can provide the SolidWorks model too.