Elecraft PX3 Owner's Manual - Manual (Page 48)

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Install the remaining two feet on the bottom cover as shown in Figure 41. If the threaded holes have paint
in them, clear the paint by running one of the 4-40 thumb screws through the holes first. Note that the remaining
four holes are for future use. Peel the serial number off of the backing paper and affix it as shown. Some
builders prefer to attach the serial number as the very last step of assembly. There is no reason it must be
attached now, but many builders find it easier to get the label on straight when the cover can be laid flat and
stable on the work table.
Figure 41. Installing Fixed Feet and Serial Number on Bottom Cover.
Install the two tilt feet in the slots in the bottom cover as shown in Figure 42. Do not tighten the thumb
screws. Leave them loose until the front cover is mounted.
Figure 42. Installing the Tilt Feet in the Rear Cover.