This is a pump I've been designing for a while. Finally went and hit the 'print' button today. Features: - Proven volute technology. - 1 13/16" dia. 6-blade impeller to create max flow. - Converging/diverging restrictor to increase efficiency. - 16mm and 19mm spaced mounting pattern provides motor flexibility. One thing you'll notice is this pump is quite large. (shown next to a @Tugboat pump for comparison) That's why I call it a battleship pump. I'll later do cruiser and destroyer sizes. I decided instead of having the exit port come out the side I would have it go vertical to hopefully help prevent air-lock problems. We will see. Anyway, here are some photos. Hopefully tomorrow I'll have some flow test to report.