After puzzling over how to mount home switches, one day looked at plastic sheets cutoffs I have and thought ...hhhmmm.
Turns out the plastic sheeting is EXACTLY the size it is noted as.
I wanted to mount the switches to the aluminum extrusions as simply as possible, and have the switches mounted so they would make contact with a substantial part of the carriages.
Turns out a piece of 1/4-inch plastic spaced the switch off the aluminum extrusion so the lever on the switch contacts the main portion of the 1/4-inch steel carriages directly in the middle. The lever itself is 1/4-inch.
Used some turn-in nuts that fit into the slots on the aluminum extrusion rails and button head machine bolts to attach the switches to the aluminum extrusion.
Because the X- and A-axis are slaved there needs to be a way to align the axes on the home switches. Given the manner in which the home switches are attached, all that needs to be done is loosen the button head bolts a bit and give the piece of plastic a little tap to move it.
The Z-axis home switch will be mounted similarly, however, have to remove the stepper motor [which means taking apart the cable chain mount and cable chain] and get longer machine bolts to mount the stepper motor, plus have a bolt made with a head the is longer than normal along the shaft axis so it comes in contact with the switch.
I am beginning to think that a CNC machine should be designed from the home and limit switches out ..... I am certainly developing expert status over taking portions of this machine apart and putting back together.