Check it out.
The blue mx2speed is mine. It's newer than the silver MX2speed which is my friend's reel that was purchased as soon as they were released. Notice the difference in the dog and sprin assembly.
IMHO, I prefer mine over Neil's dog. Neil's dog will eventually wear and then it will not go back into the lock position. I may inquire about using the other dog cam to add some redundancy, or upgrade to the assembly.
The only I do not like about my assembly if it seems a bit too complicated and may prove to be too frail for a reel. I'll see