Thanks for the ideas!

I am inclined to stick with the KISS principle and go without the pump, but move the tank back to the cavity just in front of the CG (under the wing leading edge). That will give me a little room to properly pad the tank from vibration. I'm not sure if it is just my setup, but it definitely is not going to work in the stock location being hard mounted in the former. I'll see how the fuel feeds from there and decide if I need to try the pump or a regulator. Not sure I'll even notice the minor CG shift at this point since I'm just getting back into things after 10 years of not flying RC. Reliable and easy to tune are probably more important, just need to get the bubble issue solved.