I finally bought a presto fry daddy and after getting it open realized it doesn't have an adjustable thermostat. It says the proper frying temperature is automatically maintaned. How the hell does it know i want it at 375 to fry some perch? Seriously, anybody have one of these and if so hows it working out? It looks like I need to spend a little more cash to get one with a thermostat so before I did, I thought I would ask. Thanks.