@Black-Square Scott from JF directed me to on Aug 11, 2023. It's truly not an issue it got overlooked because we're both busy people.
I can send you many more materials and provide my own experience maintaining these aircraft. While I haven't had a chance to work on 850 specifically, my regular customers were 700C1 and C2 (very similar to 850), 910, 940 and 960.