FX2D works better than JAVA2D on ruby-processing-3.0

Interesting pre-processing of pde sketches to move "size" from "setup" to "settings" does not seem to be implemented for FX2D sketches see sketch:-
FX2D sketch run from processing ide

Possibly because of a Ben Fry kludge JAVA2D isn't playing well in ruby-processing-3.0 (but then I tried FX2D) and happiness ensued shame about the opengl sketches jumping around

def setup
  sketch_title 'FX2D'
end

def draw
  background 0
  fill 200, 0, 0
  ellipse width / 2, height / 2, 300, 200
end

def settings
  size 400, 300, FX2D
end

Sketch run from ruby-processing-3.0