In article . com,
says...

acme screw stock onto the remaining stub of the lead screw. Alignment
was not perfect so I ended up laying the asm on a steel table and
giving it a few loving taps w/ a copper or brass mallet.

Don't feel bad, this is a pretty demanding job. You need to
be very accurate when you bore and turn the pieces to fit, and
you need to have a couple of spots that are nearly press-fit
in assembly. But you also need some regions with a thou of
clearance for the sliver solder.

Jim


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