Found a tank. Looking for one more for Dave Fitzgerald so we have spares for the worlds. Thank you!

What makes those tanks so special?

I think mostly just the light weight.   A metal tank that size can be up to 2 1/2 ounces.  The carbon tanks around an ounce depending upon plumbing.  Downside might be more likely to develop leaks where the tubing penetrates due to vibration.  The ones I've seen have the tubes held in place with JB weld or similar.

Dave

It would seem to me a plastic tank would be a good compromise.

Contact Sparky. He's making some carbon fiber tanks and should be able to help y'all out.

Steve

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Unfortunately Sparky’s tanks won’t work. To fit an 8.25oz tank from sparky, we’d need a tank that’s 8.25 inches long. My tank compartment has 6” of room. The Kaz tanks are taller. I run Dave’s setup and use the Kaz hard plumbing tank as well (with big fuel tubing as well). One tank I repaired with JB weld, it will be the backup’s backup tank. another hasn’t leaked in the 4 years I’ve been running it.

In our discussions, Dave couldn’t get the run he wanted with a clunk tank. These specific tanks work great for the run we’re after!