three days in and here is the update.
new reflector turned up and has lowered the temps by 3c which means i don't have to get up at 6:55am to shut the tent up
i think i have moved the bud sites into their final positions. still room for tinkering though
this is the split one, the stem has become more rigid and there is no sign of major discoloration
i added a dose of hygrozyme at 4 ml per gallon to clean of any shit on the roots before the water change which will be in 3-6 days time
amazing growth rate