Hi there!
I clearly made this mod for fun. It's released under WTFPL license (Do the **** you want license), but you may not make profit from this mod without my permission. This mod adds a new gas tank (fuel tank) to the game. It holds a lot of fuel, but it is not OP.
Statistics: Mass: 107 tons (Very heavy!)
Size: Medium (Compact!)
Entry cost (career/science only (cost in R&D facility)): 10000
Cost (career/science only (how much it costs in SPH/VAB)): 20000
Fuel held: 9500 (Darn high amount!)
Oxidizer held: 12000
Tech required (career/science only): General Rocketry
You need heavy engines to lift this thing! A small engine won't be enough.
Here's an example of how heavy it is: I made a new rocket using the gas tank. I launched it about ~230m in the air and stopped the rocket. I released the gas tank and it fell on the launch pad. It destroyed it.
I hope you have fun, the source code is on the GitHub page (so is the download if Curse doesn't work)!
Video reviews:
Thanks Kyle Kidd!