StuffIt Expander will un-zip the oxz file, you can get it from the App Store if you haven't got it.
There's lots of people here who can help you (much better than me) if you have questions problems with editing oxps/oxzs.
Yes, of course, I knew there was a way but completely forgot Stuffit' - thank you so much.
The maintenance overhaul shouldn't be coming up that often (and compared with even a low-paying passenger run shouldn't be putting a significant drain on your profits, either). What sort of ship are you flying, and how often would you say you get the maintenance overhaul offered?
I'am flying a fully laden (Navigational) Cadaceus Alpha and regularly jumping 10/30 systems. After the first 3/4 jumps A warning flashes up telling me that the Service Level
has begun to degrade. This degradation continues until either I scrape into my destination or I DIE in mid flight.
If I do manage to deliver the passenger/s any potential profits are erased by the need to return to the 'Perfect' Service Level.
The maintenance overhaul you refer to is not the problem here (I don't think) that seems to be popping up at normal intervals.
Thank you for your interest.. W-P