I am sure you know about this. Not sure if it is what you want.....
[image]http://www.kennebell.net/accessories/boostapump/picture.jpg[/image]
[image]http://www.kennebell.net/accessories/boostapump/flow-comparison.gif[/image]
http://www.kennebell.net/accessories...boostapump.htm
Some swear by it, some swear at it.