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one more thing.....
The dotted line indicating the reference radius for the hole that is drilled and tapped to hold a set-screw (ie a hex head "bolt") doesn't necessarily have the hole punched and drilled at "12 o'clock" to the virtual centre of the whole plate.
Depending on what sort of base/ how you fix your pier to the ground you will want this tapped hole in possibly different positions on this "dotted" reference radius circumference line in the plans - mine is at 10.45 (quarter to eleven.)
This is because the set-screw you place in this tapped hole (which could just be a plain hole with lock nuts on either side of the plate to hold the "bolt") is the "spigot" (the projecting bit on the top of the HEQ5 tripod) that allows for fine azimuth adjustment.
Determining how or in what position your pier is fixed to the ground, will determine in which position that set-screw spigot is - ie you try to have it aligned as close to geo south (with reference to the now non-existent centre point of the plate) as you can for minimal azimuth adjusting of the mount.
Cheers, Darryl.
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