I smashed (literally) my way through two sets of the sh!tty ones on my RFM before I realised there were better ones.

I actually had the "good" ones the whole time I was smashing flipper bats into pieces. The thing that threw me was that the casting of the "W" was actually better and crisper on the sh!tty ones - from the top the "good" ones looked like the copies as the "W" was all blurry. I hadn't thought to compare the underside to notice the extra reinforcement.