Final Summary of changes to mirror holder in Tip-Tilt holder.
Determining minimum range for Side Clamp:
1. The initial distance b/w wire-release point and mirror assembly COM = 0.265 mm
2. But this distance is assuming that wire-release point is at mid-point of clamp. So I'm settling on a range of +/- 1mm. The screenshots below confirm range of ~1mm between (1) side screw & protrusion and (2) clamp screw and clamp.
Determining length of tilt-weight assembly rod at the bottom to get 20mRad range
The tilt-weight assembly is made from following Mcmaster parts:
Rod - 95412A864 18-8 SS #2-56 Threaded Rod
Nuts - 91855A103 18-8 SS #2-56 Acorn Cap Nut
Since the weights are fixed, only rod length can be changed to get the angle range.
So a range of 1 mm between nut's inner face and mirror-holder face should be enough. Since holder is 12 mm thick, rod length = 12mm + 2 x 1mm + 2 x (nut length) = 12 + 2 + 9.6 = 23.6 mm = 0.93 inch. So a 1" rod from Mcmaster will be fine.