FUTABA 3pk, 4 wheel steering mixing         Futaba 3PK 3ch mixing   Push switch3(PS3) off   Select CH3-POSI in menu3     Mix1 setting in menu2     Mix2 setting in menu2     Function setting of each switch   SW1 is PUSH SWITCH1 (PS1) SW2 is PUSH SWITCH2 (PS2)   Can select 4WS and 2WS by PS2   PS1 become side-crawl