Another fuel system question

[John S]

I've read most of the posts concerning fuel return lines but I have not seen this question asked or addressed anywhere.
Do you think that the original fuel supply tube can be used as a return on a sumped tank?
The supply line on the Monte tank goes into the tank and to the bottom with a screen on the end. My tank is sumped and it has baffles in the bottom of the tank for the sump. If I can reuse this line I will not have to add anything for my fuel return.
Thanks.