Hi

Is the sound sound when you knock on the top of the bolts with a
hammer, do they all response with the same sound ?
Lead and ss with no deforming of the wood , with no black water with no
strange coloring of the wood around --- well I guess that the lead
protected the ss well , --- one are in the plus and the other in the
minus end of metal catalys ability ,acturly the lead would protect the
rods , in such cases what you realy shuld look at is the nuts not the
rods.
---------- If there are any corosion there will be miscolored wood not
just a profe that the seames are well copper sulfated , there shuld be
a huge quantity of iron salts , are there ? If there are any corrosion
you will hear it instantly as bolts corode in different stated , one be
good another almost gone they will respond with a click or a knock
depending how much material left. Damn plain steel bolts been lasting a
century , this is even ss progerly a place where the only metal near
by, are one that acturly protect the rods.
Listen to them look if there are any dameage on the wood ,if huge
amounts of iron salts are miscoloring the wood ---.
Don't repair it if it's not broken.
P.C.