Verify - changing FWHM around 10% and well-sampled Gaussian LSF

As shortly discussed on SPS telecon on October 21, 2020 and on Slack DRP-2D, fmadec reports a) changing FWHM in the data on the level of cca 10% and b) LSF being described with a well-sampled Gaussian c) Are the wings really as strongly suppressed as a Gaussian?

The report is at https://sumire.pbworks.com/w/file/fetch/141725733/LAM_Subaru_SM1_LSF_20201013.pdf

arnaud.lefur reports that the visits used are:

medRes,argon:25914..25937
medRes,neon:25938..25961
lowRes,argon:26524..26547
lowRes,neon:26548..26571 

Verify these claims