Please bear with me while I ramble a bit before getting to the point... Along with being a ferret owner with my wife, I'm also a tech student studying machine tool technology. For this semester, we need to design something and next semester make it. I was fooling around with a sort of adaptor plate that is supposed to snap onto the side of a cage so you can plug your ferret tunnels into it (it wasn't for the brand of cage we have, BTW). When I tried to fit one of our existing tubes (super-pet/ferretrail) into it, I realized they were different makes. The adaptor plate was for a different brand (funtels? ...lost the tag), which you insert then twist. The superpet brand you snap in. It occured to me then....why not make a plastic injection mold for an adaptor ring that would allow you to join these 2 brands? I haven't worked out the details yet...not even sure its feasible since it has to be kept fairly simple (for a mold), but would there be any interest from other ferret owners intrested in mixing these brands of tubes?? I'm not aware of any other adaptor ring on the market. John [Posted in FML issue 2801]