Yes Cathar, you are correct - the inches of water values do not agree with PSI - my bad. (I changed the order and updated the PSI numbers from draft to final but didn't update inches). I have submitted a revised table.
I too was surprised by how well the MCP650 performed (especially the max disch head) - guess I got a very good one!
Thanks for the suggestions as well, always room for improvements...
I'll keep working on it!