HPA Rig Questions

Just to throw in my two cents, I've been thinking about building an HPA rifle, and from what I've read the Tanaka vs KJW is a 50-50 thing it seems. Some say the KJW hop up is terrible, others say its fine. XavierMace on airsoftretreat.com will be comparing a group of gas rifles to compare- info here-->http://www.airsoftretreat.com/forums/index.php?topic=78565.1075 (sixth post down from the top)
Also, with the ninja tank, it only regulates down to 450 if its the one I've seen
http://www.ansgear.com/Ninja_Aluminum_Air_Tank_w_Adjustable_Reg_13_3000_p/ninjatank-13.htm
which is WAAAY too high for those mags, if you go that high your gonna get metal shrapnel. You need a regulator that is able to go under two hundred to operate at a safe level. If your planning to keep the full length barrel then you don't even need a hundred to get to a high fps I believe, although I'm not entirely sure, but I've heard of getting 550 with 40psi.

I apologize. now that I think about it does seem kind of ridiculous, When woogie said fine tune I thought he meant just to get consistency and the exact PSI you wanted at 450, I did not mean field pressure. But, I did read a thread a little while back that it was possible to make one explode. But, that was a pretty old thread. I also should have thought about the other weak points in the system, and like you said the other parts would probably go first.

Once again, sorry. I will be much more careful I feel the need to post in the future.