I'm looking into options for the center and counter gear for my Kyosho Turbo Optima. I have replaced the two gears with stock UM-1 gears after the chain jammed and killed the The two gears. After replacing the gears, I removed the chain to run in 2wd and save my gears. I am noticing the gears are showing signs of wear already. I have been looking around and noticed these Thorp upgrade gears and am wondering if they are actually any better or should I continue to search for a full replacement for the current center/counter gear arrangement.