If the beam entering HAM1 has the parameters that Paul calculated it should have, we could optimize the refl telescope by moving RM1 1.6 inches closer to HAM5, and M5 1 inch closer to the PSL. This would give us gouy phase seperations close to 90 for both the tip tilts and the WFS. If we do this, and the beam entering HAM1 is in reality the value we measured yesterday, the gouy phase separations will still be above 70 degrees.
Here are the separation caluclated in both cases:
| Paul's beam X | Pauls beam Y | Measured X | Measured Y | |
| WFS | -89 | 89 | 74 | 76 |
| TT | -89 | -88 | 84 | 77 |
I've attached the a la mode script I used.
Even if we move both RM1 and M5 both 1 cm too far, all the gouy phases (for both the measured and calculated beams) stay above 60 degrees. (same is true if we move them both 1 cm less than we should). So the tolerances on these positions are fairly loose.