1st drain water test, leakage.
2nd drain water test, more leakage on the source side.
3rd drain water test acceptable, minimal source side which will be under water anyway.
Time for 3rd post for railing. The shims are actually plugs since the block holes are larger than the bases, thus need to be blocked to hold internal concrete. Filled with concrete the lower block attaches to the base and the rebar.
Aligned with the other 2 posts as evidenced by the string.
Four more blocks and the post is done.
The 2 porch guardrails, one visible in front, 2nd previously on the side (now in the back side yard), will be between the posts.