Master cylinder + reservoir is difficult to check, located above the
pedal in the cabin

That is a really strange arrangement. I can't recall ever seeing a
hydraulic
reservoir in any production vehicle passenger compartment.

do forward control vans count??
the VW LT i had, whilst it had a cable operated clutch, the brake master
cylinders resovoir was mounted inside the dash board, you lifted a flap on
the top of the dash up to get at it,

i recall the brakes were a ******* to bleed, so i had a garage use their
pressure bleeder, only the seal on their cap wasnt that good, and it ****ed
half as much brake fluid out as it did into the brake system.... of course
this ended up in the passengers footwell.