ORIGINAL: Trisquire
Tetra and/or Jett tanks don't require foam rubber isolation, and you can run them until they're almost empty. With traditional tanks, you have to leave enough fuel in the tank to keep the clunk submerged.
Tom
I'm going to have to try one of those two types of fuel tanks. I'll try to find something with a really clinched in front end to test the bubble-free characteristic and then power it up with a strong engine.
Ed Cregger