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Page 4 of 9
Prepare the Plastic Lid:
Using the 2" hole saw and drill, cut as many holes as you
can
with out cutting thru the structural ribbing. If your anal you
will want to mark all of your holes first to make sure they are evenly
spaced. Make sure to keep the left over plastic "doughnuts" you can
use these instead of the Neoprene Collars, by simply cutting a slit
from the center hole to one of the edges.
Our final pattern looks like this:
We end up with 40 holes this way.
Use the wire brush to clean up the holes and remove the burrs, don't use it too long in one spot or you will melt the plastic.
Next, The Water Level Indicator--->
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