From that angle, the wear looks ok. I found on my pinion that the problem was a weak and mangled latch spring. $10 later and I'm in good shape now. It's also worth buying new latch sleeve bolts (the four) and new locking tabs (preferred instead of the old wire locking method apparently). The other thing you have to verify is that the latch "capture bolt" (can't remember its correct name but the bolt whose head the latches latch on to) is correctly oriented so that the latches have a decent bite. I also found that if the latches landed on the spline, they were also limited in how much purchase they got on the bolt head.