Haven't got a picture yet because I want to add another instrument or two in the spring. I don't consider it "finished."

I don't know that Sin is recommending one or the other. Electronic avoids having to fish a tube through the firewall, but my gauge is analog (VDO). Ultimately, however, pressure is mechanical so a pressure transducer is going to be located *somewhere.* In the mechanical gauge, it's inside the gauge. In electronic, it's somewhere under the hood - perhaps right at the vacuum tree. My mechanical gauge returns readings according to specifications published here and elsewhere, so I expect it's pretty accurate.

To get the instrument light color to match, I got one of the cheap green painter's gloves at Home Depot and cut a fingertip off to use as a color filter. It's perfect.