Z Axis setup.

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About the 8 bolt plate: The top 2 bolts secure it to the sadle, there are washers to space it slightly away from the saddle.
The middle bolt pulls the 5mm thick alloy plate inwards, is has no spacer washers. It keeps pressure on the grub screws.
The next 2 are grub screws are threaded into the plate that push outwards, to adjust, twist and align the read head exactly with the scale rail.
The bottom 3 bolts just carry the read head plate. This design reaches around, up and under the stainles steel scale protection shield.

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