As I said, zip drive is fine. I can boot the Plus from my 800K disk and it automounts the Zip Disk. 

I used the LIDO pMount app to make sure the drive was set up as startup, and it is. 

Soon as I reboot, it goes back to a blinking question mark. Wont boot from the Zip. But as soon as I stick my boot disk in the drive and boot from that, it mounts the Zip disk fine. 

I did format the zip disk using Lido on my PB180. Which is running System 7. But I copied a System 7 folder on the Zip disk so it should not matter. 

I am starting to feel like an idiot, back in the day I used to know all this crap.