The probe fill is a little awkward in comparison to the snap on quickfills I'm used to but I reckon it's still better than screw on and off and you get a gauge as well. It's the best of both worlds. The new gauge version isn't like the old hydrographics version so it doesn't have the potential for leaking.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep