I finished the drawing for refcav mount and the top plate. Everything fits together, so I'll submit the drawing tomorrow.

New things I added:

• Top plate for holding the thermal shields, and the cavities with screws.
• wall between the cavities for radiation shield.
• new top plate for the seismic stack, the dimension is similar to the one we have now, but the hole pattern is modified to fit the refcav mount
• cap for thermal shield (not shown).

The refcav mount is a bit wider than the top seismic stack plate, but it fits inside the chamber, see the assembly. So I don't think it will be a problem.