The sprue plate adjustment is handled by a hex-drive screw with a spring washer under it (serving as the hinge pin). It is locked in position by a hex-drive set screw found on the side of the mold block.
-The allen wrenches shown in the photos on the MP website come with each mold, and are for that very purpose.
I don't know anyone that has had to adjust alignment pins in a Miha mold. But if it was needed, they just use an interference fit.
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