34MM P30 master cut away

             notice the poppet valves are tilted open

P 30 master cylinder gets a sight glass

Sight glass for brake fluid level check without removing the lid.

Put the top and bottom fluid holes at a 15 degree angle so they will be vertical with everything installed on the Bob Stone hydroboost.
                     O rings seal the plate to the reservoir
                 Glasses are 34.5mm watch crystals 2mm thick

 8-32 button head stainless screws in tapped holes of the plate sealed with Loctite 620

            Brass nuts hold it on