OK I'm new here and my front end is a bit sloppy so I've partially been this route already. But... Variable rate springs such as Wirth's available on eBay for about £62 a set, might seem to answer both problems? Or is this new boy foolishness?
Look here for the ones I was looking at:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=001
Jamie.