Request: Step-by-Step guide to make a HHO blowtorch?

Greets,

Can someone please make an "Idiots illustrated step-by-step guide to making/ and safely using a HHO blowtorch."

I am into metal sculpting, and I'd rather use HHO, than some explosive gas (methane/butane) in my house.

Proven tech, or not. Regardless of how "inefficient" it may be - I'd like to be able to see it for myself - as I'm sure others would be too.

Many thanks.

This is something I've been interested in for some time, I also am having issues locating instructions on it's assembly. If I come across any, or develop my own, you'll be the first to know.
discover hydrogen.com has a set of e books that are 20 bucks they cover alot of these and more