I use a three line system with extensive filtering in all my applications, glow or gas. Too many problems are related to not keeping the needles and jets absolutely clean. It took me some years to find out there was no alternative for a three line system though.
On board filter in fill line, plugged for flight. Fuel flows only one way through the filter.
filter in fueling line. Fuel flows only one way through the filter.
filter in clunk pickup. Fuel flows only one way through the filter.
I strain all fuel entering my fueling jug. Fuel flows only one way through the strainer.