Thanks @On_edge I had called PP before starting this thread and apparently didn't reach the right person. I was initially told I'd have to upgrade to the Three Event software, and then add the Zbox upgrade on top of that, and that the paddlewheel input was no longer supported. However, I just talked to Aaron at PP and he explained he can make it happen. He also assured me that all I needed was the Zbox upgrade and he'd install the necessary program on the software to utilize the paddle wheel input. The only issue is he thinks it'll only work in wakeboard mode, and that is 0.25 mph increments, so he said he'd change the program for my wakeboard mode to adjust on 0.1 mph increments if he can't get the trick mode to allow it.
No change in price either....truly is great customer service which I've always experienced in the past with PP.