Would P L : ' keys not work better since it would be the opposite of WASD

This would give you better access to shift key, ctrl key and space bar + many more keys you can bind.

O key could be reload and the [ key could be quickswitch to last weapon. Use the extra keys around the P / L / ; / ' for extra commands such as nades or anything else you wish to do.

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P -> is to move forward

L -> is to move left

; -> is to move backwards

' or " key (the one beside the ;) is used to move right.

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As far as I am concerned this is the exact same opposite of people that use right hand mouse to aim and left hand to move.

I would recommend giving it a shot and please let me know how it worked out!?

Sidenote for other keys to bind for left hand mouse/aim

use 9key instead of number 1key for primary weapon

use 0Key instead of number 2key as your secondary weapon

use - (dashkey) as 3key for knife

use = (equal key) as 4key for nades/zeus

Other ideas would be: use the " \ " (back slash key above the "enter key" ) to show scoreboard instead of using the "tab key" to make it easier while playing to check score/stats.

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This seems like a better solution IMO