gary,
appreciate you thoughts and understood you prefer the 8.8kw.
i had a few competing needs hence the softly approach of going for the 2.5kw.
1st was it needed to fit over my existing electric hob - the 8.8kw version is much bigger and would have taken up the whole hob space.
2nd need is that i wanted to use the stove to simmer the bases - the 2.5kw is almost too hot for this on it's lowest setting.
3rd i wanted it easily portable if i found i was not able to cook indoors (the heat, fumes, splashes etc)
i'm very happy with the performance of the 2.5kw - i need to cook with it a bit to see if i can improve my technique to even start to think the hotter stove (bigger jet) would be of any use - burning the tom puree showed to me along with the very fast evaporation that i get now get that i'm not that far away from the optimum.
i'm not that fussed on Chinese so i don't have large volumes to cook - just 400ml at a time down to 200ml.