Sorry to spoil the fun, but anti-static mats are absolutely NO-GO on any Beogram.
First; Due to the thickness of the mat, the needle tracking angle will be wrong.
Second; Because the presence of a record is often determined by either optical
sensors or weight, many Beogram models will think there is a record on the
platter – even if it’s merely the mat, and they will gladly try to play it…
A needle lowered onto a rotating felt mat… Ouch, – bye needle.
Third; One is never needed, if the deck is in good working order.
You could run a grounding wire from a bolt of the main bearing (note its position or you
will have to realign the bearing) to somewhere on the main metal chassis.
Martin