[Citroënbender]

Thanks, very helpful. I should have added the run lengths, one is about 5-6m diagonal while the other about 24m to the shed’s sub board. A lot of what I’ve read about derating was from UK sites and their specs are obviously a bit different.

Underfloor access height varies from ~900 to barely 200 but I will dig clearance for a human torso when doing, if I have to. Life might suck for half a day, but then it’s done right.