Ok got it, thank you. But the armboard looks like its slightly too big since its going over from the silver plate to the black plate? Sorry again for not knowing the right names of all the parts.
The arm board is the black piece. Suspended with the platter slightly above the silver top plate with the silver tonearm mounted to it. This is the style of the 160 arm board. The 150 and 125 have the boards that are full depth and a few inches wide.