S-320 MKII Arm Mounting To Metal Deck

Mounting an arm to a metal deck is a more complicated version of mounting to a wooden or fiber top.
he latter are much easier, but similar methods apply.

The first thing to do is to double check the mounting dimensions.  The S-320 MKII mounts at almost exactly
the same distance as original Rek-O-Kut 12 inch arms.

The MKII  mounting base requires a slightly larger mounting hole.   Therefore, we must enlarge the hole to
accept the new mounting base.  To protect the cosmetics from inadvertent tool digs, generously tape the
surface all around the work area.

The MKII arm is usually a few mm longer.   Also the mounting base requires a slightly larger mounting hole. 
Therefore, try to file more in the direction of the corner, that is, away from the spindle of the platter.  This is not too critical
as the mounting of the cartridge can easily compensate for inaccuracy.

Total filing time can take up to half an hour.  Work all sides but try to do more towards the right-rear.

Once finished with the mounting hole.  We must drill 3 new mounting holes for the screws.  So we must use a
center punch or an awl to mark the new hole positions.  Use the MKII base as a template.

Next, drill the 3 holes. 

When the holes are completed, remove all the protective tape and mount the base with the supplied hardware. 
For wooden bases, you may have to purchase appropriate screws at a hardware store.