I would like to buy a filling station for SCBA tanks with a
quick bleed valve –– or a bleed screw that goes EASY IN and OUT.
I have one filling station that has a "button" on it, the
quick blead valve. I give it a push with my thumb, and in one violent Pfffft all the air in the line is gone. EASY!
The other filling station I have is a (China-)
pain: It has a
bleed screw.
I need to unscrew it hard, it hurts, I don't like it at all. And that despite the fact that the screw is large-ish and has 3 blades to apply the force of my fingers better. And as people with whom I shake hands at times confirm: My fingers aren't weak.
That filling station model is pictured below.
QUESTION: 
What filling station can you recommend me, where bleeding the hose isn't a chore?
Another QUESTION: Excuse my ignorance:
I use a 500cc alu bottle taken from an FX Royale,
and
I use a standard SCBA 9L tank.

The filling station that I would like to buy: Will it fit into either of these tanks? Or do they have different threads?
Thanks.

Matthias