Wellu O2 Ring - is it accurate enough for the medics?

Moving some furniture my long lost O2 ring continuous oxygen saturation monitor turned up.
So I've been wearing it and it tells me I have loads of saturation drops during the night even though my Airsense 10 says I have very few apneas.

So I get two charts - one from the Airsense 10, and one from the O2 Ring - I can see them both using OSCAR

It shows stretches of yo-yoing between around 98 and 80 in cycles of about half a minute, with accompanying heart rate rises. But these don't align with the apneas and hypopneas showing on the Airsense 10 data

I want to know a few things - 

1. if this sounds normal. 
2. is the ring accurate
3. is it accurate enough for medics to take seriously
4. can I get the people at Castle Hill to read my O2 chart through their online PatientKnowsBest system? That's got a load of options for file sharing and giving medics permission to see them, although when I rang the CPAP clinic yesterday they didn't seem to know anything about it. It would be great if I could just upload my O2 ring data for them to see.

The medics at Castle Hill basically think my issue is solved, and I believe the CPAP does solve most apneas, but I still feel knackered and wonder if I have UARS, and the ring is showing this.