Well @
Laika, you need to do a long drive. If you hit the freeway and drive for 1.5-2hrs your hands will start to get vibrated until they are numb. It takes a good long while, but it happens to me.
I drive from Eugene to Portland (Oregon) regularly. That is around a 100 mile trip. I usually start to feel it about 75-80 miles in.
Now, for comparison, my roommate has a mostly stock BRZ. (He has the Perrin Tranny bushing.)
His steering feels lighter than mine, and more digital. The solid brackets make the steering heavier. Something I enjoy.
Now, to get a SERIOUS feel for it, I have an AutoX this weekend. There, I will have...
My car: Perrin steering rack bushings, Perrin tranny mount, Perrin Shifter bushing, Perrin 19mm front and 16 mm rear sways with poly endlinks. Stock tires.
Roommates: Stock except Perrin Tranny mount.
Friend from out of state: Bone stock.
I'll make sure to pay attention while doing my runs.