Homebrew PCBs

hi,

Got all the materials yesterday, lexan plates, lots of other plastic  
scraps of various material,
and the titanium shaft (10mm).


Now i'm wondering how to assemble them to a preferrably working spray  
etcher ;-)

Initially i was sure i only want single-sided operation but right now it  
seems as if it would be easier construction-wise to make the container   
for two-sided operation. (i think i will opt not to implement the second  
sprayer right now and just drill the opening later if / when the first one  
works...)

I made a quick drawing (using my PCB layout software ;-) )
<http://groups.yahoo.com/group/Homebrew_PCBs/files/ST/sprayer01.gif>

Note that in the drawing two options for construction are shown, the lower  
edge is straight joined and the upper has a third piece inserted to allow  
the spray pipe to sit as far away from the board as possible.
The one version would be easier to manufacture, and i'm not sure the 40mm  
matter...?
Both edges will be made the same of course.

The material is 5mm lexan, with the yellow parts beeing some other  
plastic, i'm not sure yet...


I will drill a hole in the top lexan plate through which the sprayer tube  
can be inserted. the top yellow plate sits on this hole (with a seal).  
This should allow easy extraction/change of the sprayer tube for tests.

I will glue the lexan with silicone, as i have it, have used it before,  
and it possibly allows re-use of hte lexan should the whole affair fail ;-)

The plan is to assemble the tank, and do exhausting tests with water to  
find ideal spray nozzle pattern/size before filling it with etchant.

Let me know what you think, right now i can use every suggestion...

ST