Good news work around... The super neighbors can use your tools if they reload the farm or go to another of your farms. I have checked that out several times now, and it does seem to do the job. Just land and reload to use owner's tools...
(Someone mentioned earlier that after working the first farm the tools kick in, but you don't have to work the farm... Just reload.)
So this is officially my "most favoritest" upgrade ever..
And the changes to Co-op quests is also super!!! Thanks!