You may or not be have seen this:-

www.trackace.co.uk

Well i got a complimentary set off Terry from Trackace to use in anger to run it through its paces and evaluate them. My initial findings are very very good. Its repeatable, seems very accurate/repeatable, much quicker than setting up a string box and cheaper than dunlop gauges. I'll have the kit with me at race weekend if anyone ones to have a go with it, borrow it or just have fiddle.