We moved to the Shire from Gibson Avenue in Padstow over two decades ago..but it was where I spent many a happy night with my Meade 10 SCT....hence I know first hand that it isn't easy dealing with a glowing sky.
But...you might want to take a look at everything at the back of the CCD imaging train: CCD cover slip, window, filters, reducters, correctors
They need to be perfectly clean and as dust-mote free as possible. Makes calibrating the data later far more forgiving