I decided to go a different route on tuning my ZL1 so up for sale is a like new Diablosport Intune Handheld Tuner. It's only been handled twice and the screen is new with no scratches of any kind. These are on sale at most places for $400 shipped...
I'll let this one go for $315 shipped. You can read about the tuner here:
https://www.diablosport.com/products/intune.html