I was searching for someone that had completed the PC3X banks. I found this forum, question and problem.
I made two banks for my PC3X and they work perfectly. Use the template starting with 1, start filling it out, cursor up to the top entry and hit delete. cursor back down and finish the entries to 128 (the old Kurzweil standard stopped at 99 remember?) When you get to 128 stop. Start a new bank named bank01 & voice #129 is the first voicde, again use the template starting with 1, and fill it it.
It works. I can't post it yet because I have a lot of entries to make before it's ready to ship.
I have every Kurzweil ever made and the PC3X is a little different. I prefer the K1000-K2600 bank change method myself.