Another thing I going to do is to move all the pumps external.
Anyway when the MD55 comes it will replace 2 pumps so that will be min heat introduced from the pumps.
Those insulation material can use armaflex, insuflex etc, looks the same to me.
Actually for my car aircon I did the same thing and the improvement is quite significant but that could be due to the very much higher temp of the engine bay and the cold pipe being aluminium. For us the tubing are plastic so it is not as bad.
Guess I'll check with Dr chill regarding the performance.