This job was a suggestion by Steve and I requested 5 hours of HaOIII data to see if it would be worthwhile requesting more.
Like you I found the OSC data unusable, but also the HaOIII data quite challenging. I wasn't going to try and process that data but thanks to you posting your image I had a go. Only used 12 subs, 1 hour of the 5 hours collected, those that I thought had less problems to deal with, so the result is not great with lots of noise to contend with.
Given the right sky conditions it might be worthwhile to collect some more HaOIII data. If anyone thinks this might be a good idea then perhaps they'd make a new submission.