The MH106 records on FWR are the admissions/discharge registers, transcribed in full. The only other records within MH106 that FWR didn't touch were the detailed operations reports that pertain to some records. In essence there may be further records pertaining to your FIL within MH106 at the same section the admission/discharge register notes. In my experience of this collection it isn't worth simply going in 'browsing' since there are 1278 separate files for a start!