Ummm, well I cooled them over winter, around sept/oct time. Just stopped using the light and left it at that. They stayed over the cool end of the viv away from the heat mat most of winter.
then end of Jan I started to leave the basking light on during the day and they started to come out after a week or so.
Sorry to say I never really took notice of temps or anything, just left it to the snakes.
They are now eating like mad, apart from the eastern who still won't take on his own. I have an egglaying box in there now and the incubator is turned on jut in case.
The red male has done both females now so keeping my fingers crossed.
Mike