Home manufacture of fuel is a federal crime.
Home made fuel on a public highway is a federal crime.
Home made non approved DOT fuel cell is a federal crime.
Tax evasion is a federal crime...you did calculate the total amount of hydrogen and paid your road tax ..right?
Tampering with a emmisions system is also a federal crime.
Warranty is voided by use of that .

Those are the good points........
Bad points .......
Intent to manufacture a bomb .......
Insurance liability ,you did inform your insurance company about the new bomb ,I mean fuel source ,and its unapproved non DOT certified container.....

Soo lets see here ..........
DOT violations
EPA violations
OSHA violations
FED violations