I also had a conquest fitted at badders, at the Gatehouse trade stand but I did'nt like the way the hat sat on my head, so going to get another HS1 and try another hat make :) and I found that the hat peak would break/crack very easy
I personally wouldn't use iced bags and leave on for any amount of time as this can cause "ice burns". I would hose with cooled water or sponge off repeatedly. Their is plenty of B.E legal leg cooling gels on the market now.
I left my mare out 27/7 and the last 3 weeks I brought her in at nights. I think its very good for them to exercise as much as possible and have a munch on the grass. Then after foaling she snd foal was out in the afternoon.