Recirculating bench bleeding went out of favor around 15-20 years ago. It's difficult to even find the little plastic tubes with the double thread fittings these days. Now new or rebuilt master cylinders come packed with two plastic plugs instead of the recirculator tubes. It's quicker, simpler, and a lot less messy to simply plug the ports and let the fluid displace the air in the cylinder bore by letting the air come back up through the vent ports while short-stroking the MC.
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!