Ideally Andy I'd like something between your current medium (too stiff even mounted) and the stock spring. In fact the current medium is so stiff I'd even lean more towards the stock one than in between, it's just a little too loose for my tastes. Great for full analog style, but not so much with a restrictor on and a more traditional arcade cab use. Honestly just squeezing my hand it's very hard to tell the difference between med and hard, they're very close.
As long as we're discussing issues, I have a question:
When I fit a restrictor (currently using the square one) and program the stick as such am I right in understanding that that I'm actually losing resolution on the stick wrt the map grid? In other words, even with the restrictor added in software a hit on the far edge of the map grid doesn't register. Is there no way to effective 'shrink' the grid to fit within the new restricted movement so that the full grid is available? Given the low resolution of the 9x9 grid vs the high resolution of the stick this would seem to be trivial in theory at least.