Ya know guys, I have the oil door shutter and can slide it right in between the cooler and the baffle on the very same mounting bolts. (I designed it that way.)
I plan on running it initially without the shutter in place. Reason being... Maximum cooling in an unknown set of parameters.
I do plan on doing trips from here to say, Florida in the winter. Having a shutter for trips like that would likely be a benefit.
Now, OTOH... a purist would say, "That is what the vernatherm is for and you should set your plane up better", or something like that.
This might be true but there are LOTS of winterization plates on spam cans out there!
Sooooo I guess my answer is, "Stay tuned!"
I was thinking of simply installing a summer/winter cable near my dipstick tube but locating something on the panel would be much more elegant.
Dunnoooo...

CJ