i got really tired of the near impossibility of trying to get the fuel lines off the barbs when hooking up a pressure gauge so i redid the tee for my dual feed with a diagnostic port so i can just take out the plug and screw the gauge in.

 

That's sweetness.

I just left my gauge tee'd off my fuel lines permanently. 4 years later and the only problem I had was when my gauge came loose and slipped through the engine compartment.

 

Great idea. I may do the same.