Matt,

Glad to hear that it is still working well.

I suspect that some varieties of Tygon were formulated more like Tygothane. This is because some of the "Tygon" I purchased later in my gasser experience held up well and remained flexible while the older stuff turned stiff in less than half a year and was very stiff in cold weather even when new. I'm sure I'm not the only one who crunched a nice model because of that crap.