Minefield All Board Sizes, Hard

The following is a link to speedrun leaderboards for Minefield: www.speedrun.com/minefield
The following is a link to the leaderboard for all board sizes on hard difficulty: www.speedrun.com/minefield?h=...
The following rule is from the above link: Timer Starts upon selecting "Start Game" on First Board and Timer Ends when "Congratulations" Screen pops up on the final completed Board of the Run.
Message to soulslayer434 (the mod who verifies the Minefield runs; here's the link to their CZcams channel: / @soulslayer434 )
I hit "Start Game" at about 0:01 and the "Congratulations" Screen pops up at about 5:01, which makes this a run of 5:00. If these end marks are wrong, feel free to correct me and I'll edit this video accordingly.
Recently, I decided to do runs of All Board Sizes, Hard difficulty because I've gotten much better at Minefield since my last submitted run for this category (which had a time of 6:14 and can be seen at this link: • Minefield All Board Si... ).
GAMES IN THIS RUN
Medium and Hard: 0:01-1:40 with a time of 1:33
Big and Hard: 1:57-4:16 with a time of 2:14
Small and Hard: 4:37-4:59 with a time of 0:18
THEORETICAL POSSIBLE TIME FOR ALL BOARD SIZES, HARD
The following are the best times (with links to each run included) for each of the settings in this category and how much faster they are compared to the games done in this run:
Medium and Hard ( • Minefield Medium, Hard... ): 1:14, nineteen seconds faster
Big and Hard ( • Minefield Big, Hard 1:... ): 1:34, forty seconds faster
Small and Hard ( • Minefield 0:04 mins Sp... ): 0:04, fourteen seconds faster
Adding together the above, it's possible for the games in this run to be one minute and thirteen seconds faster. Theoretically, this means a time of 3:47 is possible.
I don't feel like calculating this but a faster time than 3:47 is also possible when you factor in how the best individual runs and menu navigation in between games could've gone faster. Whatever the theoretical fastest time is, getting it would require a lot of luck because some mine placements make for faster games than others and you need very good mine placements for three consecutive games.
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