So today I found a really cool print in place differential model.. so I printed it out and the cage broke when trying to break the gears free, try 2 same result.. the cage was only about 2 mm as designed so we beefed things up to 3x5mm on the vertical portions of the cage. printed it out a few times after my fix and it breaks free great everytime without destroying the model!
and heres a link to the fixed model..
https://www.thingiverse.com/thing:5192592