Nope, no scrapes at all mate, there was a fixing bracket in the kit for relay box.
i thought there might be something to hold it properly, it looks a bit tacky with the relay box hanging off... i'll have to get Dave to send me one. As for the scraping... it's wafer thin... barely noticable... just wondered if anyone did check though, cos the clearance between the strut and box is miniscule.
Also just noticed, i followed the instructions in the kit, which show the L shape bracket mounted in the engine bay to be opposite way rount to the ones in the pics above. Which brings the strut in a little closer and hence why mine may scrape. The instructions were for US spec IS's and i noticed, that they don't have the alluminium brake cylinder box, in the engine bay where we do?!?!