Ability to refuel certain fuels in certain circumstances (ISRU, mining)

I've been thinking about SR2 needing refueling. This isn't another suggestion about being able to easily refuel by drilling rocks. I think SR2 should make certain fuels able to be obtained in certain environments.
Example 1: in game, Taurus is referred to as having lakes of liquid methane. If there are lakes of methane, users should be able to use those lakes to refill methane fuel tanks.
Example 2: In real life, Gas giants have atmospheres of helium and hydrogen. Sure, it's still gas, so it would take longer to fully fill Hydrogen and Helium tanks.
Example 3: in the stock game, there is a resource that is a bit more rare: water. There are two planets (that I know of) that have liquid water on their surfaces: Droo and Nebra. While it might be counterintuitive to refill water tanks on Droo, it might be useful to refill them on Nebra. There might be water ice on other planets though, so that is the only scenario where drills may be useful. Now, you may be asking "Well, how would the game know what fuel to refill?" Well I have an answer for you! In PlanetStudio, there could be a subsetting for the water settings, that allows you to choose if the "water" is a liquid fuel or actual water. Similarly for gas giants, there could be an atmospheric setting that tells the game what tanks can be refilled.
Now, you may be asking "well, if we added this, how would the player refill the tanks?" Well, I propose the addition of four new parts:
1. Refuel Valve: a special fuel valve, that if submerged in liquid, will fill a separate fuel tank with the fuel or water.
2. "Raw Fuel" tank. This could be a new type of fuel tank, that takes the fuel from valves and other sources, and stores it until it can be made usable.
3. Fuel Inlet: this could be a separate setting for inlets or a whole new part. A refuel inlet, would be a special type of inlet that can pull the fuel gasses out of the atmospheres of gas giants, and store it in the afore mentioned raw Fuel tanks.
4. Purifier: a special (albeit heavy) part, that can take raw Fuel from raw Fuel tanks, and makes it useable, and able to be put into regular fuel tanks. As to not make it too easy, the purifier could be
A: heavy and big, and
B: uses a lot of electricity.

If you have read all the way to the end of this, Thank You!! If you upvote this, I thank you even more! If you do or don't upvote this, please try to think of questions to ask me. I want people to try and ask questions, because I want to try and answer them, in order to refine this idea even more, and to make this suggestion as rock solid, and polished as possible. Thank you for taking the time to read this sprawling text to it's entirety.

IMPORTANT EDIT: So, me being stupid, I forgot to add something to this. There was another part idea: An H2/O2 generator. What this would do, is turn water, into hydrogen/hydrolox but would use large amounts of energy. For every 2kg's of water, it would generate 1kg of Hydrolox.