I'm drilling guide holes at a 45 degree angle for 2 x 100mm gal bullet head nails which will hold the end pieces in place attached to the layer below. |
I'm hammering them in flush with the timber so they don't interfere with the side pieces. |
A hole is drilled for the overflow pipe. Its 500mm from the end and placed so that the tank will overflow when it's full to a depth of 250mm. |