Pneumatic questions, sorry!

[Laser]

Another couple of questions, what's the difference between an fp and a hp system.]

Nothing they are both the same.

Also if you are using fb am I right in thinking that you don't need a regulator?

Yes you are right.

Also you may want to bear this in mind, these pressure levels (fp) are very high which are very dangerous.
Its best to start off with low pressure (LP) and then work your way up.