Hi Eric,
Its the 115, 9 cylinder gas engine I am interested in. I have started a few hand drawn doodles of the general configuration of the Bulldog. I am surprised that the build looks to be really quite staightforward. Dressing up the engine with the very prominent fuel distribution pipes will be an interesting challenge, as will the natural polished metal of the front fuselage, but after that it could have been designed with the modeller in mind. There is a very colourful example in the RAF museum Hendon. I may base it on that aircraft of I may base it on Douglas Bader's aircraft.
John