Thanks for answering the question about TAG, cemchris. Terry, although the gear isn't cheap there are some developments recently in the HPA market. You can build your own system for under $1k finally, lol. If you search other forums on TAG you'll see what I mean. I should point out that the noise in that vid posted from SKUNK420 was from the low pressure pond pump that circulates the "brain" in that system and not from the high pressure pump. Most low pressure systems that rate the pump by GPH are loud and create heat and most high pressure pumps are external. Look at some of the other vids from that youtube channel and it may make more sense.