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Yep. Look here..........

http://dreamworksrc.com/catalog/mach...rt-p-1426.html

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Model Aviation Products make very nice rings that are perfect for the job. They fit through the hole and have a flange with lots of little holes drilled to hold the glue and set it securely. I am having some tanks made at the moment and am using the MAP rings on them. The FEJ tanks are not naff, they just need finishing off. I would never use a fibreglass tank without fitting an aluminium ring to strengthen it. As yours have cracks you will have to pray that the glue fills it and makes a waterproof joint. You may be able to seal any tiny cracks with Cyano after the ring is fitted. You can use Hysol or I have found Acrylic glue for this application to be better as it runs into cracks.

John

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these would work.
Vin...

http://dreamworksrc.com/catalog/mach...rt-p-1426.html

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I just checked Ali stocks them

http://alshobbies.com/shop/cat.php?i...=21&NumShow=20

John

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yeah unless you get the kevlar versions any fuel tank should have the metal inserts. They all will crack over time, I dont plan on getting the tank upgrades on my next jets since I think the fiber glass will work just fine.