Search "Pressure brake bleeder" on Ebay. The first one on the list is $99.94 with free shipping, and it comes with an entire case filled with different adapters, a working quick-connect, a pressure gauge, and a bleeder that works without a lot of monkey motion and trial and error. Some things just aren't worth the hassle of trying to Rube Goldberg something together out of bits and pieces.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!