Haven't put much stock into what engines were used. LOL!
But the Mk.I has a Bristol Mercury Mk.V. I'll go with the Bristol Perseus for the Mk.Ia, and the Bristol Taurus for the Mk.II.
The Finnish Badger will probably be equipped with the Wright R-1820.
As to MG armorment, I hadn't gotten into anything more specific than the .303 cal. Although I'm thinking Vickers for the Mk.I and Mk.Ia, and Brownings on the Mk.II's.
Here's a slight update: