Ed,
As I wrote, keep the pic's coming. You've been doing a super job! I have followed quietly.
I have the same Raby DTM series motor as you in my Beck/SE Spyder. I stuck an 8" diameter e-fan under my spare tire and made a thin tin duct to blow air into the DTM fan I only use it when it's super hot out and I'm sitting in our wonderful traffic here in the DC area.
I haven't posted to the SOC in a while as I've been enjoying my 60 Austin Healey Bugeye with a Donald Healey hardtop since it has heat. It's a ton of fun in the winter though I've been out in the Spyder in 27 degrees, Just have to dress warm.
I keep thinking I need to make a pilgrimage up to see your Spyder build in person. I met you with Syl at Carlisle a year or so ago.
Pete