Hey Neil your compost creating sounds brilliant.
Yes too much heat is not so beneficial, and I am guilty of that.
Biodynamic people like cooler heaps for extra fungi and microbes (though maybe more weed seedlings) so basically we have choices.
In practice it’s about how much time & space & materials you have at any time of year. Plus moisture and in your case I would line the pallets with thick cardboard on the inside, as you build up/fill the heap, to conserve moisture and warmth.
Keep us informed of progress!
