carb
Sounds like you are pretty thorough, and right on about the inlet lever. It makes sooooo musch difference when it is right.
That diapragm will actually slow the pulse, it takes to long to go from plus to minus pressure when stretched like that.
Let us know how she works, I think you will be quite pleased.
Jim, I agree, tough nut, takes practice. I have just never been real pleased with the 19 setup.