The Snap-On kit retails for $399, but can be found cheaper. The Matco kit sells for $130, which isn't too bad. This is my fourth or fifth time borrowing one so I figure it's time to invest...
Lee, You're saying you leave the 45* fitting in the case, so it's an easy hook-up for each time you want to check the pressure. What are you using to cap the 45* fitting when there's no guage installed?
K.