I finally got through most of the configuration issues and was ready to attach the propellers and fly. There are both the wiki (picture) and text directions for 3D propeller attachment however the aluminum mounts that come with the kit were straightforward and I attached the propeller directly without using any of the plastic rings that came with the kit. Snugged them down by hand.
When I tried to fly it some of the propellers flew off and/or came loose pretty much instantly.
I returned to the directions and tried using the plastic rings that came with the blades per the directions but they don't seem to work--the stock metal mounts already have a collar that sticks up and goes into the indent in the blade so the plastic rings just make matters worse.
Do I just need to crank these things down? Should I locktite the threads? I see there is a little hole in the tip--does that fit some special tightening device?
Here is the reply I eventually received from support. I thought they might post something here, but they didn't...
Most of our engineers normally fly their multicopters without the rings, just making sure to hold the propeller well centered while tightening the bolt. We have contacted the manufacturer, and we will be receiving a shipment of metal rings for the motors so that the propellers will sit flush with the threaded portion of the collet and thus be able to tighten the propeller mount completely. We can ship you a set of rings for your propellers once we receive them.
We apologize for any inconvenience this has caused, and please let me know if you have any questions or concerns.