i have to replace my top front strut mounts on my mark 3 gsi. so the struts have to come right out, and the springs will be taken off. the question is i would like to slightly lower the springs but i dont have much cash to spend, is it safe just to cut the spings down at the top say 20mm. is this safe, and will it work. or should i leave them well alone. any help would be gratefull thanks.