September 28th, 2018
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I did more or less a complete bottom-bracket overhaul today.  Despite
my best efforts to flush as much crap out of the non-drive-side bottom
bracket bearings, having the left crank still attached just made it
too hard, and I was bothered by the amount of grittiness I could feel.
So, despite my tremendous reservations, I pulled that troublesome left
crank so I could get right into the cup.

I had originally built the Franken-Peugeot up with caged bearings, 9
balls in each cage.  The unanimous advice of the internet seemed to be
that replacing this approach with 11 uncaged balls was well worth the
extra effort, so I did this.  Being able to do this on both sides at
the same time was another motivation to pull the left crank so I could
service the entire bottom bracket.

With the new, un-pitted drive-side cup installed, and new bearings and
new grease on both sides, my short test ride in the area around the
co-op was nice and quiet.  Well, not 100% quiet, but definitely a
total lack of the horrible sound which had been bothering me.  The
remaining sounds I can hear are slight and I don't think they're a
cause for major concern.  Getting a Franken bike made of random parts
to run totally silently is a big ask.  I think the biggest remaining
sources of noise are, one, that I am using a 1/8th inch chain but my
chainwheel is designed for narrower derailleur chains, which permits
some side-to-side movement, and two, that the pedal bearings have a
little play in them.

So, the biggest problem that I've been facing for quite a while now
appears to be solved.  I would *love* to immediately embarck on a
really long ride, but naturally I am now once again greatly concerned
about that damn left crank coming off, since it has been reseated.
Before pulling it, I used a permanent marker to put marks on the crank
and on the spindle so I could put it back on in precisely the same
orientation, so that I could hopefully keep the same seemingly secure
fit.  I did everything "properly" putting both cranks back on (greased
the splines, and gave the bolts a little extra tightening after an
intial ride to account for the loss of preload), so fingers crossed
it's all good, but I don't want to find myself far from home on this
bike until I have convinced myself that it's staying put.  Thus,
relatively conservative riding on the weekend - perhaps to my recent
S24O location for some outdoor coffee and back.