Well, as a test one day I stole the "smartpipe" idea and instead did it with chain links. (well, I didn't "steal" the idea, as I didn't know about it at the time, but I learned later) So if you remember anything about the smart pipe thing a while back, just replace the metaballs with chain, Each one at a 90 degree angle to the one next to it so they all fit. True, it isn't perfect, (every once ina while it doesn't intersect correctly) but it works easier than the alternative.