> I have seen wonderful footage of cockroaches actually swarming around
those
> ultrasonic insect repellers though :-)
>
> I have not
> I built my own with good success , many however don't have the skills .
Doesn't take much skill at all! The concept is hardly rocket science! (And none at all if you buy the commercial versions) What it takes is proof that they actually work. Looking forward to seeing yours.
MrT.