Ian, you must have looked into my box of things to do. I have a 16" thermo controlled electric fan to replace the mechanical beast, just haven't installed it yet. That looong allen wrench adjustment on my 300E is the Lambda adjustment for the fuel mixture adjusting the output voltage from the O2 sensor and makes for a smooth idle. One item I'm working on and have had good results from on carb equipt domestics is Water infection. I'm almost there. Happy Trails and New Year Beep Beep from out foxed Houston.

Donald
oh what fun it is or will be or whatever