I upgraded to a newer boat with Zero Off and pulled the ZBOX from Perfect Pass before selling it. It worked great on my 04 MC. It wasn't just like ZO but pretty darn close and really helped when going to tournaments with boats that use ZO.
It is really simple plug and play but you need to have Stargazer to use it.
The price from Perfect Pass is $399 but I will sell to a baller for $235. Shipping and Paypal fees on the purchaser.
message me for more info.