A Round Trash Can
A Old Electric String Trimmer (gas if you're really good at mods)
Some Scrap wood 1x2s
.25" Hardware Cloth
1" Deck Screws or Similar Screw
Note: One picture below shows the machine upside-down; snap off the screw ends with some pliers.
Step 1: Cut Holes in Trash Can
Mark and cut the holes for the trimmer shaft (actually this center hole becomes a lot bigger later on so the head spins freely)
Mark and cut holes for your hardware cloth screen. Leave enough metal/plastic to support the motor.
Step 2: Add Screen
Add some wood supports to hold the hardware cloth and strengthen the motor mount. Screw into wood from the inside of the can and snap off the screws if they're too long.
Also remove any shrouds on the trimmer so it can fit flush onto the base of the can.
Here I also cut the center hole bigger so the head spins they way it should.
I also added a plastic spacer at the base of the shaft so it sets the head a little higher to clear the can.