Looks fantastic and likewise I'd love to have one rather than a chimena. Only issue if you were to make it yourself was the safety implications of cutting open a couple 9kg gas tanks. You'd have to make sure they were totally inert and empty or you're gonna have real problems......
I'm sure I've heard about a chap down in devon that makes burners out of old gas bottles, can't remember where I saw it but apparently they are selling very well...
I saw these at the Dorset Steam Fair last week superb bits of kit and really well made and the suprising thing is they light to carry when dismantled . i was chatting to the guys on the stand with one lit and it gave off next to no smoke ! apparently they are made from pressed steel so if you need to put it out in a hurry you can chuck a bucket of water over it and not have to worry about buckling or cracking ( he claimed)