I had a D112 (2 seat 65hp) for many years, and a DR1050 Ambassadeur (2+2, 100hp O-200) for many years after that (well a share in each actually).
At the time of owning, I dont think DR1050s (2+2s) were allowed on permit. I think it may have changed, but I wonder if a restriction on seats (i.2. 2 max) might have been placed on 'em?
Even on CofA, a very economic and rewarding aeroplane to fly. That nose down attitude in the cruise was excellent and the performance on 100hp astonishing.
Wish I'd kept me share...