I have a 1" blowoff tube, but I can't use it. It's too small to just jam into the neck of the carboy (i.e., it leaves a gap). I can stick it in an airlock body and attach the airlock to the carboy with a drilled stopper, but the 1" tube is so rigid that it causes the stopper to keep popping off the carboy. That is, the tube has a coiled shape it tries to keep, which applies torquing or pulling force on the airlock/stopper it's connected to, and the whole thing won't stay in the neck of the carboy. Anyone have a solution for this?