Aso and Nishino did fit-check on Febrary 22nd.

There were 2 issues in the optical components

1.  the sizes of the screw head for OBS1 were too large and they touched both sides of the OBS1 mirror.
2.  the new mirror mount for OBS4 doesn't have a reference mark to set on the mirror

for the issue 1, Fukushima-san fixed it and Nishino did fit-check on March 4th.

Issue 2 is left on the date of this report.