I have the 1mm spacer. With the cassette off, I can feel some play in the freehub body. I've never tinkered with hubs but I like to learn how to do my own maintenance. Do I need two 15mm cone wrenches to get at where I can try tigthening the 10mm hollow bolt?
Edit: Found this excellent video:
https://www.youtube.com/watch?v=a9mAHypsjdo
I'll order a pair of cone wrenches and check that 10mm bolt.