I use a RAZER naga V2 hyperspeed.
I think using some brail can be beneficial when locating buttons by touch.
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BUTTON 1: 1 bump
BUTTON 4: 2 bumps
BUTTON 7: 3 bumps
BUTTON 10: 4 bumps
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BUTTON 2: 1 bump
BUTTON 5: 2 bumps
BUTTON 8: 3 bumps
BUTTON 11: 4 bumps
and so on
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Mouse clicky button top: 1 bump
Mouse clucky button bottom: 2 bumps
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also, bro would be good used on keyboards to locate buttons by touch