flat spot didn't work
Ok guys ...the flat spot didn't work....BUT what did work was to drill out the exhaust port.(thanks thud)..quit a bit. THEY NOW SLAM DOWN AND LOCK.
I am sure the flat spot works on the older style with only 2 orings..but with the new 3 oring style .....YOU MUST DRILL OUT THE EXHAUST PORT if you want to use a robart retract valve with spring airs.
again thanks alot.