I just bought a limit from the ebay seller I mentioned. The physical size is identical to mine. Had a choice between a NEW L250 and a USED L300, and although mine was L300, I got the new one because of your advice. This will shut it off when 50 degrees cooler, but my friend said the heater would very seldom reach 250 degrees anyway.

I hope to be nice and warm in time for Christmas! :-)

Blessings!