Coordinate Training

Can anyone tell me what the optimum or indeed the maximum for this training is? I am currently around 23 per minute.

I am at 22 with a good mouse and a very few attempts.
I guess a very fast mind may reach 30 at most ?

60 is alright

However being committed on this coordinate training after reaching 20 doesn't look useful to improve your chess ?
Does anyone see an interest in going further ?

i don't. while better players tend to score higher, i think that being acquainted with coordinates is just a side effect of getting better, and not the other way around

Thanks for the feedback. Looking to be at 60 by the end of the week!

Keep it up !
:)