Making your frog ears

Here's a quick photo tutorial of sorts showing the parts needed to constuct some "frog ears".
1)The top photo has a wooden handle glued on to help reduce noise from your handling(try it and see if you need this mod).
2)Pictures 2/3/4 below it shows the unit with the label sanded off ready to glue the handle on and also "close up" with the foam windscreen taken off so you can cut/drill a hole in the t*pperware bowl and insert the unit. I used shoe goop as it seems to work well with the two types of plastic. *note:the tape is to keep water/chemicals out of the battery compartment.
3)Pictures 5/6 shows the unit as you recieve it,notice the label on the back that can be sanded to rough up the plastic for glueing a handle on, also the backside is sanded for glueing to the bowl.

*note:I've wasted a few bowls as the drilling/cutting can crack it...so go slow and cut with a piece of wood supporting the back.
That's it...
Technique's for using this in the field:
move from left to right first to get the general direction of the caller.
keep doing this until you need to turn down the volume(thumbwheel on unit).
then up/down and left/right to pinpoint the exact spot if you're planning on hand capturing it.
at the same time look at the surrounding area (5 foot circumference) for any females or immatures as they'll be hanging around the general area.
It may take a few times to get the hang of it, but I usually keep 2 with me because it sure saves time/frustration when locating the male.
bowl $2
glue $5
sonic ear $25-$45 plus shipping
triple A battery comes with unit and last a looooong time.