Couldn't wait any longer just been out on a road test, did a run 30 to 70 before and after Nos as per manual and no change in the plug colour, not a vast difference in performance but definately noticeable and no unusual sounds, well actually an alarm went off during a bit of exuberant acceleration and I thought what the hell is that whilst gripping the steering wheel speeding along....after a few seconds I realised it was the passenger seatbelt warning, the spark plug wrench and a few other bits made the car think there was someone in the passenger seat whilst under acceleration lol!

Gets the n00bs every time

I suppose with a 20 fuel jet it is not even going to equate to a 10% power increase so I was not expecting fireworks but it was noticeable, ....so where do I go from here as far as the next jet sizes and im a little worried about how accurate the AF ratio is as the test run showed no difference in the plug colour, is that good or not. The plugs are brand new and dont have much coloration to them at all in fact they were a very light grey before and after the test run which to me as old school seems lean, I know cars thes days tend to run leaner, in the good old days a biscuit brown colour was a good colour?

A 25 jetting isn't going to be super spectacular on such a potent vehicle stock, but imagine the difficulty and expense just to get that kind of increase N/A! The most noticeable increase is in the real low rpm range and I bet you didn't set it to hit low, which I'd encrourage at least a 2000 rpm hit in first: you'd feel a good surge then.

I had it set to come in at 1100 rpm with 100% power all thru as if there was no controller but to be honest the car is so quick stock and the revs rise so quickly it was hard to distinguish any low down hit at the moment, I felt it more mid range, I think, the roads were a bit busy and not ideal for testing

In regard to plug color, it sounds to me that you're spot on with the jetting. If the plug color hasn't changed, then it means the factory A/F ratio hasn't changed and that is ALWAYS on the rich side. Any darker would put you further in the safe zone at the expense of top end performance. The important factor is that they all appear similar to each other (indicating a good distribution) and that there is no detonation peppering. Regardless if the plugs were brand new, they would still turn dark quickly with an excessive rich mix, white for too lean, or peppered for danger. Using seasoned, or even slightly seasoned, plugs will give false readings that can hide a problem.

[color=#BF0000]That makes me feel better

The fact is that plug reading is THE MOST ACCURATE way to tell A/F ratio and more compared to ANY gauge. I only use A/F gauges after I read plugs and then record the ratio where the plugs are happy as a base. That way I can tell if somethings changed on the gauge and verify with a plug check to pinpoint a problem since the gauge can only read the average of ALL cyls and not the specific one in question, and that's where the plug will stand out and tell you.[/color]

At least im now at the fun stage

You've nothing to worry about at this point. You've already determined that your car likes the jet ratio given and it's all about having some fun and perhaps even stepping up to a 40 or 50 jetting, which is VASTLY different than what you're using now.