Thanks for your replies.
I find that because I have a smaller SCT (8"). It cools to ambient temperature fairly quickly compared to its bigger brothers (12" & 14").
I don't have anyway of actually checking the temperature inside the OTA so I cannot be certain. If I leave the OTA outside for long before I start imaging it should allow the OTA to reach ambient temperature and stay close to it.
However, I am sure that being able to cool my SCT in minutes instead of hours would save me time I personally don't think I need it at the moment.
