Homebrew PCBs

I've just bought one of the ET-20 Velleman etching tanks from Rapid 
Electronics, it seemed good value at £34.95 + VAT. I've only tried it 
with a small scrap of PCB material with a pattern scribbled on it 
with a marker pen, but it seems to work very well, taking under 5 
minutes to etch it using FeCl3. The tank includes an air pump and 
heater. The bubbler is built-in to the base of the tank, and has the 
orifices angled, so that the bubbles take a sort of circular path 
rather than going straight up, which should help achieve even 
etching. I managed to drop the board, clip and support wire into the 
tank, but it was quite easy to fish it out with a long piece of 
plastic.

It's a lot easier than the technique I've been using for years - 
manual agitation of a plastic food container in a larger container 
filled with hot water.

Here are the details:

<http://www.rapidonline.com/productinfo.aspx?tier1=Tools%
2c+Fasteners+%
26+Production+Equipment&tier2=PCB+Equipment&tier3=Etching&tier4=Etchin
g+tank+with+agitator+%26+heater&moduleno=77727>

Leon