The Empeg unit itself is generating enough heat to cause the volume knob to slip. I don't have a convertible. And the problem has presented itself on a warm day (85 deg F) while I was working on the unit in my garage. I usually drive to work at 9am and don't go home until 11pm and my drive is only 15 minutes, so heat hasn't really been a problem for a couple of weeks.

This is a design issue and I imagine that all units will need to be sent in for warranty upgrades soon, unless there is an easy knob replacement that can be mailed out. What about mounting a fan to the Empeg to get some of the heat out of it?

-Hoagy.