This bearing works on worn or non worn driveshaft and uses set screws to ensure the shaft is turning with the bearing at all times. Gen 3 now has a slot so the collar can be pinned with an m5 bolt and allowed to float on shaft if one desires this attachment. If one still wants to stick with set screw method that is still an option as well. We recommend 2 set screws and pinning the 3rd hole with the m5 bolt to ensure the collar can't back out in the event of set screws coming loose.  Gen 3 started shipping 3/12/26.