I was just wondering if I would be able to put a pump kit on a fastback without having to modify anything. Also do you have to put and eletronic frame on them?

People have done the fastback as a pump without too many problems.

BUT i would advise that you do not get involved with Doc as he is wanting to get out of Paintball, and so you are likely to pay for it but never see it, i paid for mine July 16 2004, and Doc has not sent it or replied to my e-mails.