Bernie , are you saying this gauge will leak
I have one on the kitchen counter , ((it's been there for
9 months ))

, it is to replace my first gauge that works well
just does not have any lights in it for night time riding.
..
for OP the elbow you got from Arnott works well
after you stick the hose in there , push the hose as far "in "
as you can and pull back on the little ring at the end ,
it is the piece that is around your actual plastic hose
and is inside the metal elbow , there is some small play in there
once pulled out ( less than 1/16 inch)
it will stay pulled out and
keep your plastic hose planted as far " in " as possible .