Try the FS85USB Foot Controller[LeftCtrl=W]+[Left Arrow=Cover]Tap the foot Controller softly off center when walking. Unassign keys that are not need and remove default setting and replace them with yours setting or key you will not need EX:[`,t z p x ' ;.]
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Try the FS85USB Foot Controller[LeftCtrl=W]+[Left Arrow=Cover]Tap the foot Controller softly off center when walking. Unassign keys that are not need and remove default setting and replace them with yours setting or key you will not need EX:[`,t z p x ' ;.] 
FOOT CONTROL UNIT FS-85 MADE BY SONY