This is becoming a little hard to follow, and I don't want to spoil your day, so my challenge was the
original PZL 104 Wilga Mark 1, which proved to be a bit of a disaster so they had a major rethink and came up with the now much more familiar Wilga Mark 2 with the radial engine.
OPEN HOUSE.
Cheers.
EDIT
Is yours the PZL-104 Wilga prototype?
Your control Ken.