So I have accidently ordered the wrong sanding pad for my ets125. I selected the one for the ro125 instead. I know my fault. It hasn't arrived yet but I got to thinking would this sanding pad lock onto my rotex 150 so I would use all of my ets125 papers on the rotex 150 instead of buying a rotex 125? I would like to have a rotex 125 but funds won't allow it at this time.