Ianm,
The gunship conversion is the cheapest conversion I do and offers a huge improvement over the normal stage 1 setup.
It is not however better than my stage 3 gunship on greens and a 3bar, but this conversion is more than twice the cost.
People pay their money and make their choices!!
The comments the other night regards performance were simply that my stage 1 gunship performance figures are as good as a "typical" stage 3 803 std turbo setup. (Look in back of PF mag at times against 803 cars). My own stage 3 gunship is however much quicker than a traditional 803 conversion.
Horse for courses I suppose!