That's where I'm at, it's either the 91 or the 111 model. Just haven't decided on which one to pull the trigger on. You hit the nail on the head with the insert for the attachments by the driveshafts, great to hear. You and I are more alike than we think as I baby all my equipment & will be only one operating as well. Will def follow advice and not be in a hurry when Changing attachments & insterting them into shaft. I am an aircraft mechanic in my daily job & approaching g all my stuff with same perspective as the more I take care of it , the longer it will last. Super excited about info you passed on about Sharing gear head and dont have to swap whole thing. Thanks again for informative convo and will hit all these awesome things down in my notes. Take care and stay safe bud!!!