Did you can start last miner to metal "which released crow other lemmings" little bit higher and avoid use basher cancel it, like you did your replay? This make my 9 skills possible on SNES version. I know this DOS miner is different and its probably won´t work, but cannot know without testing, you can try command this miner even higher than i did my SNES solution. I quickly look this miner cancel using basher might be possible avoid even with different miner mechanism compared SNES.
You can see this strategy also my SNES video strat clok 3:19..
https://www.youtube.com/watch?v=oqiZxfJsSfs&list=PL-Cn2MW-VOj136snR0XiQSGv4jxL4135B&index=14&t=0sAbout SNES version this climber will turn around automatically when it reach right corner (because its use different starting strategy, i used basher through first metal), but if you can´t make it on DOS this climber lemmings might be lemming which release last blocker and t at least then you can turn it and break and turn both: blocker & climber safety back.
Im not are very experied DOS version, but this strategy skip basher at cancel miner might be working, only thing you really need is command miner higher than you did your replay or even higer than i did my SNES video, because this miner make mine much more deeper corridors on DOS than SNES.