I was wondering if anybody on here knows when SQ changed from using a chain to a belt, on their commercial tumblers. I'm going to assume it was also the same time they changed from the glo-bar ignitor to the electronic ignition. There are a couple of laundromats around here that have SQ tumblers from 1986, 1990, 1994 and 1997. The 86 and 90 I'm pretty sure are both chain driven as you can sometimes here it clanking around. And while the 1994 and 1997 models look very similar, I didn't know if they had a belt or not.
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