Adding FI-Fuel tank. Transfer from stock tank??

[DANTIP]

Here's what I'm considering. Install a fuel tank for fuel-injection between the rear frame rails. Rather than using the conventional filling method, I'd like to utilize my cab tank and a fuel pump/vent line to fill the tank. I assume I can do this if I connect the sending unit to the FI tank then when it is low, transfer fuel from the cab tank manually by running the pump.

Has anyone done this? Are there any good reasons to avoid this?

Thx!!