Basically I'm thinking of getting a Crosman 2250 and converting it to HPA (Air).

What I am hoping to do is run a line from the Ratcatcher to a Compressed Air Bottle on a pouch fitted onto my belt.
I'd prefer to do it this way instead of using a King Ratcatcher and fitting a Bottle at the rear, as I can fit a lot larger bottle on my belt when compared to using the bottle as a stock on the King Ratcatcher.

I'm wondering what parts I need?

I assume the following :

1) Powerlet Eliminator
2) Remote Line - Is the one end 1/8" Male so would fit straight into the Powerlet Eliminator or 90 Degree Bend, and the other end on the Paintball Bottle?
3) 90 Degree Bend - Less pressure on the Remote Line
4) Paintball/Compressed Air Bottle + Regulator. I've already got a 48cu, fitted with a 800PSI Output Regulator....Would this be suitable?

Is there anything else that I'd need to do/have?

Cheers and ATB