If it's working being straight wired then the switch that came with the saw was connected to the contactor, not the motor. In that case a switch like that Bighorn one will work just fine. If you don't mind doing a little extra work you could set up a safety switch or two. If you have a foot brake adding a switch to it is real nice. When finished cutting something I can just tap on the brake with my foot and it'll shut off the saw. When both hands are busy holding stuff it's very handy. Also if you can add a switch to the lever used to release tension you would be able to start it until you moved it into the tension position. Just something to think about.