I think if you practice dry-firing with this method, then (very carefully) with live fire, it will work. I have no way to display or link to it, but an online US military marksmanship training course I have taken suggests this be tried for members with short fingers firing the Beretta M9.

Also, in your posts you note the trigger reach of an M & P auto or a Glock is too long for you, but a standard 1911 is too short. Perhaps installing a long trigger on your 1911 is an idea?

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Alan
SWCA LM 2023, SWHF 220