I never did find the bushing that I was looking for, but today I got the wiper installed and wired it to a battery for testing. The first problem that I ran into was the speep of the wiper arm. Because of the "button" that holds the bottom of the motor to the glass, the standard 85-degree sweep of the motor is too much for the rear glass. If I reposition the wiper arm to not hit the mounting button, then the wiper motor goes past the top of the glass. I did some digging on how to adjust the sweep of the motor and found that it can be adjusted downward to a 65-degree sweep, but I now realize that really isn't sufficient for cleaning the glass. I was wondering if the motor that Kubota sells has a different sweep to it. Might anyone that has the BX23S with the deluxe Curtis cab post a picture of your wiper arm in the parked position, and give me an idea of how far the arm travels before reversing?