Excellent run for my purposes. I think I had to restart both 3 and 6 once and lost quite a bit of time there, but everything else went fine. Sub-50 is definitely possible with first-trying every dungeon and possibly some cleaner movement, but I'm probably not going to push this time any further for now.

Played on a Panasonic FS-A1WX, using SofaROM to run a "memory mapped" ROM from a Carnivore 2's virtual disk device, and captured using a RetroTink 5X-Pro. Final time determined by counting times in Avidemux.