The problem I see with your pick-up can:
If the can is 6" tall:
The FIRST time you fill the tank: -Air will be trapped under the can, until your pump sucks it all away.
The FIRST time you have less than a 6" of fuel in the tank, and you launch hard, or turn a corner, your pump will suck air under the can again, because the pump will not HOLD the can full of fuel.
You may as well have a pick-up tube that is 6" off the bottom of your tank. If the can was mounted outside, and UNDER the tank, it would be excellent, cuz then it would act as a sump for fuel.
I am only trying to save you a little bit of time here.
It's good to see people trying new idea's.
Don't take my comments as a bash...I am only trying to help.