Would I be right in thinking that with those figures, they must have bigger batteries, if so then when you are using it on petrol you will be lugging about all the extra weight.
Pretty similar to turpis
I would use 100mm rockwool slabs between the rafters and put 25mm pir over the rafters or more if possible, then plasterboard.
If you tape the joints in the pir before plasterboarding, then you will have a vapour barrier.
Millions of years of evolution! and along comes the digital age in existence for a mere second, and you are buying it hook line and sinker, its a controlling mechanism pure and simple.
Hi Bobby
I have the bosch saw you are considering purchasing, plus the wheeled stand; both items are like new. If you are interested, then personal message me, I'm in Lancashire.