Holy learning curve..
I think I'll redo the tank system "gooder", and drop an RNV in the pipe pressure line so I can get an idea of how big an orifice it should have.
This engine is made like a jewel.. all my putzing aorund, fiddling with props, mixture, starving it, flooding it, pouring castor out of the pipe, bla bla.. it has probably amassed 5 minutes of running between gurgling rich and dying on surges by now. As soon as it cools down a bit - squeak squeak.. the fit hasn't perceptibly changed.
I
know I have a small enough prop on it now..
It's all in the fuel supply.
The MDS .15 was a minor challenge by comparison.