and now for the old guy DUM question of the day..........

i have read, and been told many times by many different people, the return line should be LARGER, SAME SIZE, and SMALLER in diameter.
these have been on successful installations, so if it is successful and works, it must be ok.
i like the idea of larger, or possibly the same size. less likely to cause residual heat buildup in the fuel system.
it is also quite possible a smaller line would work if there were not much fuel being returned to the tank.
so, any return line is better than nothing, depending of course, the system design itself ?