Homebrew PCBs

Forgive me, I am sure this has already been discussed but...

I don't know if air is required or not so keep that in mind.

From the little I have read so far, you need agitation, not actually 
air.  Air is just a way of moving the liquid around for the 
agitation. It also seems that most of the rigs for this are vertical 
to accomodate the rising air.

Would this work...

A shallow, flat tank, sitting horizontal.  Across the center is a 
pivot point and at one end a very small, slow spinning gear motor 
with a cam on it. The cam rubs against the bottom causing the tank 
to rock back and forth.  This would cause the liguid to move back 
and forth in a wave motion.

Adding a couple of standoffs to the circuit board before putting it 
in the solution could be used to keep the board off the bottom of 
the tank.  

If nothing else, it might be relaxing to watch it rock back and 
forth :-)

Chris