I got all my new parts, o-ring kit, PureEnergy Nitro tank, and everything works finds. Fortunately my Mag was well oiled after I last used it 5 years ago. Everything works fine. And there are tons of nitrogen tanks at my work, so I have no problem filling my tank whenever I want.
Thanks for your help guys.
FYI;
Nuvair have some great 5000psi fittings and hoses for good prices, and they ship to Canada.