Thanks boys.
I didn't go in the garage cos there's a load of card board boxes and I just didn't want to take the risk. Although now knowing what to expect I may go to the very front of the garage where there's a bit of space. Or just get the old Hunstanton windbreak out

Seriously though... The moment I started to try n put the two pieces together it came out all brown and as if it had rusted. This surely is the gas run out. And to be fair I was practising for over an hour!
Definitely going to go for the suggested tanks in previous links cos it's being bothered to keep changing it.
Also one dummy thing I did was misread the instructions

I thought power went in this ascending order. . .
Dial 1 min
Dial 2 min
Dial 1 max
Dial 2 max
But it doesn't! it goes . . . .
Dial 1 min
Dial 1 max
Dial 2 min
Dial 2 max
That explains why I blew a few holes

I'll get there
