I used the YFZ swing arm collars too in the mock up. I just didnt realize it til it was too late when I started putting it together. I have to get this LTR bolt out and need some input as it's going nowhere fast and at this point I don't care if it messes the bolt up. I have about 5 more lol. But yes if you use the YFZ bolt and LTR swing arm collars(bushings) there will be a tad amount of play, less than a mm of wiggle. OD is the same on both but the ID is a little smaller on the YFZ collars.