Stan, that is a nice solution. I had female bungs Tig-welded to my fake "Porsche" valve covers. The only heat shrink I had at the time was red, I don't know if I ever really loved the look. And that's my fake 547-ish breather I made.
I recently learned something as well, I had plugged the outlet of the breather that goes to my R side carb top. When the engine runs long enough and gets hot enough, oil runs right out of the front crank slinger. Ask me how I know LOL.
I had forgotten to unplug this hose and reattach to the carb top. Oops.