Actually, none, and none
There's no sleeve in the valve, which I should have mentioned last night...
I'm pretty sure I'm losing velocity in 2 places- that ill-fitting poly transfer tube, and either the quad seal, or sear block spring.
I did pump it up to 15 pumps, just once, to see what it would do, and it gave me 620. Pump tension gets really heavy after 6 pumps, and that fifteen pumps is a lot of grunt work. I don't think I'll be doing that often...
I'm hoping the hill pump I have in mind for the QB-D is not as hard to pump as that- I'll be in trouble if it is...
Regards,
Doc Sharptail