Quick picture update of the pump angle/restrictions I was referring to.
It's also just shy of 90 degrees pointing in the other direction:
While I was at it, I took some comparison shots with the RW-8. Relatively the same dimension wise, however I could imagine the QP-9 is marginally bigger due to it's shape.
There is an audible sound from the pump, however, without testing it, I believe it is quieter than my MP10. I tried taking video of the pump's operations earlier, with no luck of registering the sound. To better test the sound, I was thinking of downloading the a sound meter for my phone and recording that this weekend. Any suggestions.
Also, please let me know of anything you are interested in my testing or demonstrating with the pump. I hope to test all settings this weekend.