Spot on! I see there is a Sloper engine on evilbay at the moment. Rare to see one for sale.
Swindon Branch Secretary
Ariels - 1913 TT Model, 20 Roadster, 28 Model D, 30 Model B, 38 VH, 52 VH
The Offroad Fleet - Bultaco Pursang, Beta Rev 3