Had one 20 years ago. Mods were some MMC low profile sights, clean trigger, some fine grit sandpaper on the front strap, Herret Shooting Star grips and a throat job. Excellent little piece, tho slightly harder to shoot well than the GM.
Back in those halcyon days before we knew better, carry load was a target reload, a 200 gr Belding and Mull design SWC in front of 6.2 gr of Unique. The light little Commander really liked that load.
Downside, not much. Wish I still had mine...