I have this cheap $99 fun fly and only the stock tank fits. No other tank on the market would fit. The mistake I made was using the stopper that came with it. It leaked fuel all over the nose of the plane and caused my main gear to break from weakening the balsa. I found out that the stopper was not leaking on the the tank, the copper tubing was just sliding in and out on the stopper no matter how tight I made the stopper. So I will never use a cheap stopper even on my cheap crashable planes. I will always use the Dubro, Sullivan, Hayes stoppers even if I am forced to use the stock tank. It took me only 15 minutes to pull out the tank dry out the plane and CA the gear back in place. I had to wash all the fuel out of the foam padding as well.

A long time ago, the Sullivans were splitting on everyone.

Once I was fueling a Cub,,,and fueling and fueling. Someone said, "hey Barn, fuels pouring out the tail of your plane!"

So it isn't always the cheap ones.

This was easily 20 years ago, and Sullivan has fixed the problem.

Yeah I guess you're right. This is the only plane I've had do this but I've only been in this hobby for two years. Murphy's law, if there's fuel it's going to leak.

Why didn't you guys tell me this 2 days ago!!!!!!!!! See my post under beginners!

I hate to have fuel leak in an airplane-even a "crashable" model-my policy is to always pressure check every tank installation by dipping under water with new fuel tubing attached to outlet and vent-seal off the vent line and blow in the fuel line until you feel the tank expand-no bubbles no leak. Took the advice from an old pro when I first started and have never had a leak yet. Takes about 5 minutes. I also use pure silicon grease( used to be called titration grease) and put a light coat on the stopper before final assembly. Flipstart

the saving is the base of the misery, save money in other less important things like heart or artificial liver but not in a model please!

I'm starting to read more and more post about adding extra sealants to certain parts of the engine bottle etc.

My question is Shouldn't the parts you buy be free of manufacturers defects ? and if they are not should'nt you be getting your money back IMMEDIATELY ?

See if every one just keeps on fixing things bought from hobby distributors (or adding things to help secure plane or parts ) then I feel we will never never never EVER be able to buy something and trust it was made suitable or reliable for the most picky RC hobbiest.