A method I have used for levelling posts which have four dynabolt, loxin, chem anchors or what ever you have is to tack weld a nut in the centre of the holes underneath and then by tightening or loosen fasteners on each corner you can easily get the post dead level. Once happy force non shrink grout under until it comes out the other side. Once the grout is hard a final tension on the bolts and its going nowhere.
Al
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