Yeah! Glad the advice went to good use I would recommend them but they are VERY pricey.
I did, they were just labelled WR8 socks, un sure on measurements. They're basically just fabric - I doubt they do much!
Quality I've used the same spacer on my 5th scale truck also. Great spacers for longer bolts to work in shorter holes
They've certainly helped reduce a bit of wiggle but there's still some. I've not had a bearing pop since I upgraded but having said that I've barely used it.