I know that you can get your springs arched from a pro shop, mainly because they do that kind of stuff all the time. We have a local shop that will put in a 4" arch into the springs for about $90 each pack. But I was wondering if anyone as attempted or done their own springs? And if so, how difficult is it and where abouts on the springs do you press? Yes, I do have a shop press at hand. Or even better yet, if there is a link to a website on "how to", that would be great too.