I don't know if Subupreza installed the shift-lever plus bushings, but I just installed the shift-lever (Kartboy). Figured the OEM bushings couldn't be too soft yet.
The engagement is quicker, the shifting precise, the throws about 1/3 shorter, and the stick about 3/4" to 1" lower in height. I have heard the bushings firm-up the system even more, but I'm pretty happy w the stockers so far. I suspect it's a taste thing. If you replace the bushings & really like it, please post again & let me know how it went!