Thank you for your reply,

I thought I might be chancing it and really it's not something you out to be risking for the sake of a PSU. I might just run them normally - but even then - 1540w's 24/7 - Bitmain say its grand to run 2 3+'s, but it does sound like a bit of an over-reach on the power supply front, I could possibly under clock them like 2% to bring it under 1500w until a better solution presents itself.

I think post from the US would reach N.Ireland by the 15th of Jan. So opening up the PSU to potential US sellers - just if on the custom sticker you could   decare the price as $40 or so -crazy how much tax we have to pay to get via the States when there seems to be no tax at all on the Chinese PSU's

Thanks again for your help

*edit to tidy up a bit of grammer.