Aerbabe, presumably your flying a proper Chipmunk with a Gypsy unlike our Lycoming versions at Bicester - having flown both I can report that they are equally enjoyable.
I can relate your Chipmunk conversion to my conversion to the Auster from a Cessna 152.
Did your Chipmunk go Belguim for a Fly in at Brasschat recently?
Bletchleytuggie