Ok, so basically, i was wondering how many elements you need to acquire all obtainable elements,(assuming the PGRV, NGRV, AIR, VAC, HEAT and COOL tools are allowed) not including ones that are in a loop, (such as element A making element B and vice versa without anything being able to make A or B), my first idea for an element we need for this is Hydrogen, fusion can get you pretty good results, HYGN and OXYG combust to make water, and we get NEUT from fusion, so DSTW as well, since WATR+NEUT=DSTW, then BUBW since CO2+WATR=BUBW.

Baically, what elements you need to get all the obtainable elements? (NEW RULE! setting vx and vy is now allowed)