My new plane is getting set up with the tank at the CG, which requires a pump. I've never seen or used one, so any advice would be greatly appreciated. The pressure nipple is going to get installed in the engine back plate; I will make sure it does not interfere with anything. A few starting questions:

Is it true that I not use the normal pressure line from the muffler to the tank? The directions say to vent the tank, so do I just run a line from where the normal vent line is and let it hang out somewhere?

The instructions say to set the high speed needle to a rich setting and prime the pump, so do I just do normal priming procedure?

From there, it says the engine should be running rich (if not adjust the pump) then tune with the normal valves. Is it really that imprecise?

The short fuel line that came with it is pretty rigid; I'm not sure how old the pump itself is (brand new but from a hobby store close out, not sure how long ago). Is it supposed to be rigid and/or could I use regular fuel line?

Any other tips you have would be great.

thank you.