Went back and looked at mine.
Think I measured it right and ended up about 120/65.
- or close to it anyway.
(took me some time to stop confusing angles with timings).
I'm surprised your is at 77.
I would have thought it was closer to ~67 than 77 based on the photos.
Makes me wonder if I have my own measures correct.
Guess I'll find out soon.
This picture is from 18 months ago when I split my cases.