Well dug the hole yesterday for the Concrete plug. Hole dimensions are 500mm deep x 600mm long x 500mm wide. This did not happen without some mishaps. First was that I found the water pipe with the first blow of the crow bar. $200.00 later after a visit from the plumber hole completed. Still want to bell out the bottom a little just for added torque. Here is a shot of the hole and the pipe lagged.
Second thing that happened was that I put my back out. Just stood up while digging and felt it go. This morning it is better but still moving gingerly. Won't be mixing concrete until it is better.
Maybe one night this week.