I ordered a few opto mechanical components to replace the current shaky periscopes.
The new periscope is shown here, elog:574. Currently we have only one set, so I ordered a post clamp to complete another set.
I also ordered 4 mirror mounts that can be mounted on 45 degree mounting adapters. The thickness of these mounts are thinner than a regular mirror mount, so it can be fit on the adapter. I plan to use these in Crackle experiment as well.