cheers mate, lots of patience followed by lots of swearing to seperate them bottom half of the rails, then the cossie rails lined up perfect to the starlet rails, so i sat the seat where my mrs wanted it and put some marks between the 2 rails then removed them and welded them together with the marks lining up. sits at the perfect height but its a bit of a pain in the arse that shes sat on the comfy recaro and im still sliding out my seat. ive got a bride rail from a pulsar on the drivers side recaro, im gonna mod that to fit so i can slide my seat back n forth