Homebrew PCBs

Hi


just want to inform you that the bottom side is etched MUCH faster in a 
horizontal etch
setup.

HCl H2O2, from time to time moving the container around to agitate.

at least half the time on the bottom side, the top just starts
to clear at the edges and the bottom is already clear..

i assume it is because the etched away stuff is heavy, and sinks away from 
the bottom
while it deposits on the top...

so if you do single sided board do them face down,

this is bad for doublesided, because of underetching....

i start thinking a vertical setup might really have been a better idea..

any good ideas out there for a vertical tank pcb holder?

ST