RBL Adapter Cap With Snuggers

thingiverse

I made a tiny tweak to didjareally's RBL Adapter Cap mod. I printed one out and gave it a test run - it works great when the RBL is standing upright, but doesn't grip the PVC pipe well if you hang it upside down. So, I pulled it into TinkerCad and modified the design to add some little "grippers" inside the hole. These tiny ridges are almost invisible or feelable. The cap slips onto the pipe easily enough, but it takes a lot of force to get it back off - you might need a hammer for the job.