cheers all,
I missed a step when prepping the block. The hexagonal bosses above the middle motor mounts are supposed to be drilled out to accept the weird scoop-like crankcase breathers. Best to do this before you paint things! The holes are supposed to be 1mm diameter, and it is pretty hard to accomplish this without defacing the hexagon...
The breathers themselves are on that large, oddball casting block referred to earlier. They are parts 16 & 17, 2x each. 16 goes on the starboard (exhaust) side, 17 on the port (intake) side. The scoops face forward. Refer to the pics in the manual and walkaround for guidance.
I decided to fashion screens for the breathers as an analog for the original -- admittedly ludicrously overscale but it gives an impression, and I'm an impressionist modeller
These are made from discarded radiator mesh from a D.VII radiator that went south... punched out with a 2mm punch....
installed and painted...
NOTE TO THOSE FOLLOWING ALONG LATER the intake side breathers should be installed facing aft, not as in the pictures below. Check your fit with the carburetor as you proceed.