I'm starting to gather the parts for a front dual disk..blah blah blah. I really like the look of the stock MC on my 76 550 however I need a bigger MC. I really don't like the plastic reservoir or the boxes, however I have seen pictures of old goldwings master cylinders that look just like my 550s stock master just taller. I think that this is perfect IF it is not made of plastic. Does anyone know if an old stock goldwing master cylinder is "solid" or is plastic. Thanks