Ok mate, just since I did my 345 s3 brake upgrade the damn things rattle like feck but only when I do a 1st brake fordward & a 1st brake backward if you get me, every second & onward brake in the same direction they dont do it at all & I've given more pressure to teh damn spring clips aswell, fecking things, crap design, but Steve@racepads is gonna send me some when I email him, what a PITA.
I assume you did both pads on each caliper as the 345 have a spring clip for the 1 pad to fit onto the 1 piston so I assume I'd just stick it on pad 1st then push onto the piston given its a single pot as such.
Thanks for the help & advise.