hi there, here is a "primitive" bed for a trill ring. i removed the connector and soldered wires directly to the pads, but it should work with the connector as well. the ring can be glued into the bed or can be hold in place with a little plasticine or similar.
Nice, I'm going to print one off here. We're actually just putting together a library of useful 3D models for Trill and Bela so perfect timing.