3 months of techs coming and adjusting electronics in hand control,chair would lurch left or right into walls etc ..finally a tech sat in chair and tried everything with hand held programmer,he could not drive it, he got out of chair sat on floor lifted corner up caster would not rotate. ALL 4 WERE TORQUED TO OVER 100 PSI. So whatever direction they were facing thats where your headed.

QUANTUM 6000Z