Thanks, that straightens things out. I've looked at the parts and the geartrain
seems fairly simple. The spindle drives one of two reverse tumbler gears which
in turn drive the tranny input gear. The tranny output gear is at the hub of a
banjo and drives the sliding gear. That drives the leadscrew gear. It appears
that the output gear (32 tpi) is "DR." The way I got it looks like it's was
last used for 20/40 tpi. I'm still a little confused as to the "use 16 gear to
compound" statement. Maybe what Lennie said about doubling the tpi as the
driver gear.

Sorting through the bucket 'o gears that came with this thing will be
interesting. Lots of possibilities not listed in the chart. Must be 100 in the
bucket.

Looks like I'll have to weld up a replacement tooth for the pulley bull gear,
too.

GTO(John)