I bought a Irwin for my Dewalt saw years ago. I use it for cutoffs. It is accurate once you get used to using it. It is only good for left side cuts. I have seen lasers on both sides of blade for left or right cuts. I position the wood, turn on blade to get laser on and then make minor adjustments of mark on wood to laser and then make cut. If I am making several cuts the same I add a stop block so each cut is repetitive.
Frank
Frank
