I struggled to find a piece of hardwood to make the spacer for the Tone Arm and postage prices for a web purchase would be expensive. I ended up buying a small, end grain chopping board from Argos (£8.99) my branch is only a couple of miles away. It was exactly the right thickness and the grain orientation means it is very strong under compression, which is ideal for the spacer, I cut a piece from that. I routed two slots for the bolts, this allows me to take advantage of the full 20mm cartridge adjustment in the head shell, I can have the cartridge in any position and still get the alignment correct due to the adjustment available in the new front to back base slots, they previously ran left to right. Having slots, rather than holes in the spacer means it can move with the arm and always keep the same relative position for cosmetic purposes.