We really need to get some custom springs is the USA here. IT wolud make ergo clear/ghetto green mods a lot easier.
this is something i had committed to doing a while back (not that anyone could prove it, those posts are long-gone with all my discussion regarding spring weights), but there's a spring manufacture just down the street from my office. i now have all the different cherry springs in hand, and just need to review the requirements with the manufacture.
the problem is, it's really low on my priority list, and there's some pretty high priority items on that list (like moving, again... 5th time in 3 years now).
my idea was something in between a brown/red/blue and a black... something that would provide just enough resistance that we don't have issues with the clear stem hanging up on a light spring. i'm not interested in heavy springs, and think that blacks and clears are heavy enough... for me anyhow.
i was also curious about the possibility of a progressive spring, but i've not explored this at all.