I want to replace the springs on my 2.4 with uprated and lowered items. I want to replace the front shocks at the same time (I did the rears last year), but I like the idea of a fully adjustable set up. Does anybody know if the front struts are fully interchangeable with Vectra C items? I ask because Vectra coilovers start at £200 with loads of choice, but I can only find one company offering them for the Croma at nearly £500!!