15
see comments below!!
Once the transformer is CLOSE to the chassis – insert the rubber strips or
at least one of them back into position and see if you can get a screw into
position to start securing the mains – Use the M4 Fender washer and
screw on the top of the transformer and the serrated washer and nut on the
bottom of the chassis - A good tip is to just get the nut on for now and later
when the chassis is upside down with the Mains in position you can remove
the nut and add the serrated washer – its sometime very tough with just two
hands to install the serrated washer and nut while screwing from the top
side!