Sievert torch update.
Firstly vis a vis the regulator. I spoke to the chap at Sievert's and e told me that as I was using the smallest tip I probably wouldn't notice any difference when altering the regulator. However, as the appeared to be getting smaller I guessed something was wrong (no kidding Sherlock)! I reckoned tha I was running out of gas, so went and changed the bottle and now ut appears to be working fine. I can even see a difference when I adjust the regulator. However, think I may have the wrong tip, as Caroline said previously she has never used the smallest one, and I can see why. My next plan is to buy a medium or at least the next size tip up from the smallest and see where go from there..
Thank you everyone for your input it has all really helped.