Hi,
Sorry about your friend.
Age 50 is a killer!
The best tool and die guy I ever saw, a good friend,  died one day shy of his 50th birthday.  A month later I had a brain hemorrhage that should have killed me.  I used to run distance road races.  The docs said that is why I survived it.  That squashed me.  Really tough getting it back.  I walk a mile or two everyday since.
I never meet you Internet guys, but it still hurts when you lose a buddy.
Daubie