progressive springs

[juse]

When trying to choose the best springs for my DIY-struts, I have started to think going progressive.
I read an old topic; http://www.germanlook.com/Forums/sho...e&pagenumber=2
where Jeza writes;
"S1fter has gone for 200 lbs progressive springs, so this is the rating for complete compression, which is about 10 % stiffer than stock. He chose that after testing a stock spring (then carefully filed the info in the bin!!!). But from memory he said that the first inch was about 70lbs, the second was about 150 ish and complete compression was about 180lbs."
So if s1fter is still among us, did you have a spring tester when you got those figures?
Is the figure for first inch measured after the spring is pre-compressed, as it is when mounted on a stock strut?
And where did you get those 200lbs progressive springs, I could use a pair too?
Also I have heard of a guy that put Honda Civics rear coilsprings on a super. Does anyone have experience on this?
That would be a good lowbudget-way if you`d know the rates on them..

Justin