Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan 
<stefan_trethan@g...> wrote:
> John,
> 
> thanks, but this is way of what i asked.
> 
> i know there are other options, i know there is drill rod.
> 
> but i hoped you may tell me which surface your gas pipes have.


The problem with galvanized or cast pipes is that the surface is very 
rough.  a few minutes with a file followed by some sandpaper can 
offer a smooth surface.

fixed upper bearings and spring loaded lower units can allow for the 
differences in pipe diameter.

My point of view is that if you can get your hands on something, do 
it.  then look for better stuff as you go !

Dave