A month or two after installing the Square Drift Conversion on my TA05, I noticed the pulleys started turning yellow. It wasn't really a big deal at first, but the yellower they got, the more it annoyed me. I don't think anyone else even noticed them, but to me they stuck out like sore thumbs. After almost a year of this, I couldn't take it anymore. I ordered a set of black "Limited Edition" pulleys, and when I was done installing them, I wondered why I waited so long to replace them.
Old pulleys:
New pulleys installed: