I was surprised there is no gasket between the pump and the block. The machining is very true but it just seems odd (to me anyway -of course I'm not a machinist).
I guess I can answer my own question on the clip your talking about Denny.
My question would have been...Why do guys tack weld the screen on? That screen went in super tight. I was afraid I was going to break the pump banging it on. I suppose the answer is...Why take chances of the screen vibrating loose over time Am I right?