This is awesome. However things are not working perfectly for me. My tubes are all slightly smaller than the diameter of the parts they are intended for. I suspect this has something to do with the 1.25 rescale factor, but I'm not sure. I'm relatively new to all this. Any ideas? Thanks! Here's a photo: https://www.dropbox.com/s/w1diuvdcb5mbvr7/tubes.png?dl=0