DC: your tank my be fine ..I have no clue on that...They can get a pin hole in tham..
But your fuel cap is vented....so you may look into a better grommet system for the fuel lines...
I have used this proudct very well no issue's..Here's the link........................some thing to think about..better than zenoh grommet
http://www3.towerhobbies.com/cgi-bin...?&I=LXFU79&P=7
Again trying to help out your problem......replace the lines & klunker....Slawhammer