Re: Timed puzzle technique
This time improved my personal best by about 10 seconds, so it's definitely my first time sub 1 minute
Using a keyboard doesn't make as big a difference for big puzzles as it does for smaller puzzles, since the number keys are further apart and there's usually more thinking involved anyway.
Like Beaker mentioned, it's a bit like playing piano: After a while you get used to the key positions and you won't need to look at the numbers anymore.