This info helps a couple of my competitors, but I think it will help the community as a whole even more so here we go.......
A little while back I decided to take a look at one of the IL switchable joysticks to see why people liked them. I never quite found the answer to that question, but I did find something else. The answer to the "stiffer than heck" joystick problem (it's so simple I can't believe it hasn't surfaced yet)
BTW, yes, the stock switches on this stick are clicky and stiff as well. But the stiffness of the switches doesn't significantly contribute to the stiffness problem of this joystick.
Sweet jeebus, look at the size of that thing! It looks like it belongs on a pogo stick! Ok, maybe it's not that bad, but it is a very large, very stiff spring that is resting directly on a centering plate that rocks inside the joystick housing. This is the thing that is primarily responsible for the stiffness of the stick. You could look for another spring of the same diameter that was a little mushier/shorter, but it would be a lot of effort and probably cost too much.
Or.....
These are the components that, in conjunction with the spring, are responsible for creating all that tension. The 4 screws and the top plate itself. All that spring sticking up in the first image is mashed down into the upper cavity of the joystick housing and held tightly in place with the upper plate attached with the 4-screws as shown. This puts crazy pressure on the centering plate inside and prevents it from rocking easily, thus making the joystick hard to move.
And that's how you fix it...or at least improve it a lot. I found that a spacer of about .200" on each of the 4 screws relieves a significant amount of tension created by the humongous spring. You can vary the tension to your liking by changing the size of the spacer, but beyond .250" you'll need to get some longer screws as well.
Drawbacks: Only one that I can see. The final height of the stick will be shorter by the size of the spacer you decide to use. Oh, and a spider might try to make a nest in the new opening below the plate, but they won't last long after a round with a good shmup.
And that's it. Hopefully this will help the folks who have been searching for a solution to this problem for so long. If anyone has something to add, including success or failure stories doing this, please let me know. Hopefully I haven't forgotten anything, as I disassembled this a while ago.
Final note: In the near future, I will find some nice spacers for this mod and stock them at the store in case anyone has trouble finding some that will work.
RandyT