Hello! What a clever idea about the rolled hems without the knife! Must try that.
Also don't forget you can use the overlocker with the knife but without thread. I normally cut my hems a little long to avoid too careful cutting on the table, then after they drop, mark the hemline with the dress on the dummy using a ruler and chalk, and just cut them with the overlocker along the chalk line as I hem. You could easily do that without the thread, then go back with the thread but no knife. (I also sometimes cut hems still on the dummy with scissors like hair - remember they DSI tour, that's what they said they did).
The other tip I got either here or on TSF was to use a really fine needle for hemming chiffon - 8s if you can find them, and possibly also a finer weight of thread.
I've had samples of the Trim-It superflow georgette and thought it too heavy and rather opaque compared to normal chiffon. I can see it might be nice for the sort of very flowy, rather than floaty, skirts Ann is talking about, but I personally would not want floats made in it.