I run a 16oz Benett tank on a 88" Yak with a 50cc motor. I find this to be the best 16oz tank on the market right now.
Granted it's not a glow engine, but keeping the same sound principles, will save you a lot of hassle.

All your metal tubes should be sanded so they have no sharp edges. They should be brabed as well so the tubing has something to hold on to. After installing the appropriate tubing, I use very small zip ties to secure each tube behind the barb.

The line going to the carb need to reach inside about half an inch of the end of the tank (when suspended). If the tank has a funny shape, use common sense. Do not use ARF tanks as they are ofter low quality (though some are provided with high quality tanks).

For a clunk, I use a ceramic filter that works really well (Don's Hobbies). The little cluks provided with ARF tanks someting do not have enough weight to bend the tube.

After installing the stopper properly, I put a bead of silicon around the base.

Do not use the various fuelers provided, they tend to develop issues over time. Nothing beats a proper fuel button that has a tube that connects to the carb line using a proper T fitting (2 line system) and properly secured.

I have run several 4 stroke, non-pressurized engines this way with no issues...