I have a 6.4 Module, Single Line Display, Magnet Pick up. All came out of a 2003 Ski Nautique Mechanical Drive. I will sell each part for 50% off what Perfect Pass sells them for. Great deal. Everything works. Let me know if anyone is interested.
On Topic: I started skiing tournaments this year. I have PP Stargazer with the ZBox set up. My training partner is my wife, 1 year old daughter, 3 year old son.......... We ski every day. I can't imagine life without speed control. You just have to decide what level you need/want......
I know guys that have really dialed in their PP RPM set ups with magnets on their courses and the boat pulls great. Vice versa, I know guys with ZO that don't even know how to use them and haven't mapped courses, and their pull is brutal......
So, you can get what you need for your application. I needed tournament worthy easy set up for a mechanical control boat. My option was PP Stargazer, ZBox, and go SKIING!