The Handi Heet will allow to build to a full acetylene/ propane or
oxygen set up. The Silversmith kit will not be able to upgraded to
add propane or oxygen. You would have to purchase a two stage
regulator which the Handy
You’d have trouble upgrading the Handi Heat to use both a fuel gas
AND oxygen, since this, like the silversmith torch, has only the
single fuel line. No place to add an oxygen hose…
But the dual stage regulator will give better performance.