Every Voyd and Valdi I have owned, setup or serviced since about 1990 has had spacers between the armboard and the sub chassis, I have always seen them as a part of the design tbh.
It also provides a gap under the armboard for the screws or bolts which attach the arm bases for Linn, sme, etc bases without them fouling the sub chassis.
The spacers are something like this:
https://rover.ebay.com/rover/0/0/0?m...2F272141969986
Either 6/6.3mm or 9/9.5/10mm
The "reference" armboard AN started supplying were 9.5mm thick, but the holes for the arm pillar mounting bolts were recessed on the underside so the bolts didn't foul the sub chassis.