Thanks guys
I almost packed up around 1:00am 'cos I was getting savaged by mossies and I forgot to switch on the Kendrick dew heater, even though I had fitted it to the OTA.
The SCT corrector dewed up, even with a dew shield and I had to scrabble around in the bathroom to find a hair dryer to clear the corrector plate.
This is too hard I thought, so I made myself a coffee, found that inner peace once more and then got back down to work.
Cheers
Dennis