eumundi

I've got a Makita LS1017L sliding compound mitre saw. As far as I know, it has always cut accurately but I'm now experiencing inaccuracy on wide cuts, and I don't know what to do to fix it. The attached pic shows a 300mm wide board and you can see that the cut is off by a couple of mil at the furthest reach of the saw. I honestly don't know if this is recent behaviour or not, as I usually cut narrower stock on the saw. A little while ago I accidentally bought the saw down on a heavy unsecured piece and the resultant kick caused the blade to shift off centre because it was secured with an incorrectly specified bush. It's possible I may have done some damage there. I now have a new blade on the saw with the correct bush, and this is happening. Any suggestions?