[Good to know, as a few years back, I also found the waitingforfriday code interesting and helpful. Would you be able to post the complete PIC32MX MPLAB project you converted somewhere (+ enough of a schematic or pin connection list to make sense of the code)?
I still have concerns about a C18 =>XC8 port. Hopefully its got easier since I last had that chore.
The project is huge, its a large pc program and a large MPLAB X Harmony project too.
Most of it irrelevant to your project, it would need massive cutting down and I don't have the time.
If you use the waitingforfriday project that will get you started, then just convert it to Harmony.