I have a centaur and I am fitting a beta 20 to her at the moment.

The problem I have just realised is there is no fitting on the tank for the return fuel pipe on the tank.
I have installed a bulkhead infront of the fuel tank as so I can fit sound deadening to it.
I may be able to jiggle the fuel tank to get to one of the top corners of the tank to fit a fitting of some sort. I was thinking of a 1/4" flange (if I can find one) or a 1/2" flange and reduce the threads to fit a 1/4" 8mm barbed fuel line connector. This is only if I can screw the flange down with a lot of gasket sealer.
The other idea I had (but I think it forces air into the fuel system but just wanted to check) is the water/fuel filter I have has 2 x in and 2 x out fittings on it. Could I connect the return feed onto the tank side of the water/fuel filter?
Also it would be good to hear if any body has put a beta 20 into a centaur and how has it been?
Thanks in advance for any advice.
Nick