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Hi Ben,
Basically, for a SCT like you own, you will need a dew shield and a dew heater strap (probably with a controller).
The dew shield you can make yourself, there are plans on this site for how to make several varieties. I did one from a foam exercise mat, cut to size, and velcro down the ends to seal.
But even with a shield, you will eventually need a heater strap for the corrector plate.
You can buy ones that do not need a controller, or you can buy the controller ones and run several at the same time (finder / eyepieces / etc).
There are even DIY heater straps you can make if you search here.
Or you can buy a combined dew shield with heater built in.
Bintel sell them for the Celestron range (among others). I agree with Hugh, they will see you right.
al
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