[SEL] check this out.

[R & M Ingold]

http://www.multitorch.de/hauptteil_index.html

I have been using this idea on models for a while now.
Plugs dont foul so much. I make an extension chamber that is only small but 
it seems to work for me.
I didnt know there was Business making it.
Reg & Marg Ingold.
Newcastle, NSW, Australia.
randmingold at hotkey.net.au
http://www.oldengine.org/members/randmingold