hi neil,
yes make sence, and i agree, what i was wanting to point out is that incubating most likely would have no affect, but maybe the all year weather conditions could have a affect, i know lots of breeders up here that use just hot rocks or heat mats, where as down south most use heated cages and thermastats, i myself just use hot rocks and heat cords between 2 tiles, in summer i turn all heating off as my reptile room gets to around 30 to 34 deg most days and night temps only drop to around the 22 to 28 deg, so i feel i have no need to use them, i know some might not agree but i have done it this way for 4 years and never had a problem, using this method has produced 60 coastal eggs that are cooking at the moment, my adults only had the hot rocks for heat, no other heat or cooling down was done, so i'm interested in seeing what sex ratio i get, it might not mean a thing, i only turn the heat back on at the start of winter, or when night temps start droping below 24 degs
cheers,
steve.......