Happynext360days!
I dare to ask about "glue" in this sober club. Heard this from a known
US manufacturer of Silver Filled Epoxy:  

If used on an alumnium surface, oxidizing of silver flakes and attach of
acidous hardener on aluminium can cause electrical instability. So, if
you attach chips by means of a silver epoxy, the interface between the
aluminium and the glue may be:  a)non-cured and  b)silver-oxidized. Best
countermeasure is to use a gold-filled epoxy or an epoxy which cures
with something else than acid.

It's said that severe grounding problems occured with "wrong" silver
epoxy. Maybe the user and the glue maker don't want to be advertized
this way, so no names or materials are not typed . Anyone who has
experience?              
                         / Ingemar

                Ericsson Microwave Systems / Sweden