The original version of this tool had a slot just 0.1mm in width, which on my Ender 5 Plus resulted in no slot at all. Also, it had a hollow handle (and thus, a "ring" base) which was iffy at best for adhesion. This version has an 0.8mm slot which allows for the usual shrinkage with Cura and my Ender 5 (not sure who's "fault" it is but inside holes and slots are always smaller than the design calls for). The slot on this version seems to work pretty well. Also, the handle is solid so it sticks to the bed better.