speaking of time bombs...
https://imgur.com/4iUnaJ1
one must have gone off LONG ago...
and,, it was blowing my mind, WHY there was no focus adjustment on the back like it shown in the SAMs...
https://imgur.com/PVj4QDw
after a bit of searching , I found it,, it's on the front dials, :O
they routed it there!