Have you played around with generating or burning "homemade hydrogen?
I've experimented with electrolytic production and have now turned to metallic decomposition, partly due to the availability of aluminum scrap at my shop. The challenge being safety due in part to a lack of appropriate equipment.(5 gal. buckets and rubber bladders pilfered from old nitrogen canisters on a few of our die-cast machines). Understanding limitations due to losses incurred via conservation, I'm wondering if the application of mechanical leverage could potentially overcome thermodynamic reality?