The photo of the first T lock Block is showing the form removed on one side to show how the T Lock is made, the form was removed the next morning, the block was poured the early evening before and dried overnight. An even faster way to pour PC is the slip form method shown below, I have modified it by not sliping the one form up but by adding more forms on top of the first until I reach the wall height I want.
Next photo is a close up of how it looks after the forms are removed and how well the half wall ties to the full wall.
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