Well, at the time of the release of the spindle, there were several posts like this one:
(Unless the design of the spindle has been changed in the past few months since it’s release…) The protruding bits of the business end of the spindle are considerably longer than the protruding bits of the router, allowing the sweepy to only grab the end of the body, and now allowing for much adjustability.
This clever fellow above printed an adaptor collet to make up the difference. But I was hoping the sweepy was going to be updated at some point.