Sieg SX3 Mill head front cover removal caution!
On my machine I found out the following the hard way - after almost doing damage - other SX3's may be the same:
Caution the quill DRO slide comes up between a PC board and the cover.
Quill must be down before removing the cover or serious damage could be done.
Drop quill right down and lock with the quill slow winder engagement screw only.
Remove quill clamp screw. Remove 4 main screws - it may be safer to leave top left screw just engaged to support plate while electrical connections are removed. The right side LED bulb lead may be very short - carefully unplug with long nose pliers gripped back on the wires - back away from bulb area.
Then unplug the multiblock connecters and remove the last screw - then remove the toggle switch nut and other connecters - mark the red and blue wire positions.
You will see the DRO slide comes up behind the PC board with only a small clearance from some solder joints. (on my machine this was OK - some 2 - 4 mm clearance - but I covered the solder joints area with a strip of duct tape to be extra sure).
Carefully reassemble in reverse order.