OK, so now I'm a bit confused. I read this on one of the links above
The tube thickness of SCT's is very thin, as is the corrector plate. An SCT needs better insulation because is has such a small heat mass in its glass and tube. A Mak has a thick corrector, so it holds its heat better.
http://www.iceinspace.com.au/forum/s...7&postcount=12
Does an SCT (like mine) need different insulation to a Mak? Is black foam better for SCTs than white Corflute?
[EDIT] I just noticed you replied just before me. I should have also added that I use the same black foam as a dew-shield which works really well, but it's separate to the OTA "cosy" that is normally always fitted. A photo of the full catastophe is attached.
I have some white Corflute at home (used for advertising purposes), I'll look into using that instead.
Thanks, Andrew.