talks about he isn't going to be able to make celestial bronze anytime soon, not like he has an active vulcano or water from lethe.
Gains Skyforge, a forge powered by magic active volcano (magic lavapool ontop of a mountain... yeah it's a volcano)...
Gains upgrade to alchemy
What was the alchemy required for water of lethe now? should be easier than cybertronium, right? because a manton limited blade sounds like something he would very much like to have...
Or can celestial bronce ONLY be forged in etna? if so, how did anyone from halfblood gain any, if it required tactic permission directly from Hephaestus, as you would essentially have to forge it on in his forge or just outside of it... not to mention travel from the us to Italy... hell, that rebellion would have been soo doomed, when only one side can forge new weapons and arrows.
other-vice, endbringer "blood" should be nice crafting component for his eventual bone steel weapons for endbringer fights.
since he really only needs to sell a single tinkertech piece to found himself for several months now, he should probably start charging in rare supplies, like endbringer blood and pieces, or old tinkertech from people with access...
Edit: For the cyber discussion. he should not replace anything, any risk clearly outweigh the benefits. Especially since redundant organs are a way better way to go. Less scary, keep the liver, but clamp in a new tinkertech kidney and liver. add a second heart clamped onto a major bloodvessel. don't replace the bones, but line them with cybernetics. layer cyber-muscles with normal muscles. if they are damaged, you still have your biology fully funktional, and you gain some of the benefits of being a cyborg. and as some people say, odds are that he should be able to repair the cybernetics with nanobots anyway. The way of the spacemarine friend, redundant organs for the win.