I use old paint brushes, this gives a nice holder for priming and painting, and also is good for
test-flying them around and making squawking sounds.
I cut the stick off on the taper so that it fits in to the hole for the flying base, and glue it in with some CA or PVA glue.
When I use CA I use the accelerator with it so it has a weaker bond, when done painting I just twist the stick and it comes loose.
The rider is also glued to another old brush handle.