Hi Bogart - good progress already!

Someone always points newbies to here, its my turn to do it apparently:

http://www.pinrepair.com/em/index.htm

Its an invaluable read.

Also, a flex stone and switch adjuster tool are almost mandatory with an EM:

http://www.pbresource.com/tools.html

A metal file should only be used on the higher voltage contacts like flipper EOS (see the invaluable read), it will be too harsh on relay contacts.