Like the other parts of the fence system, this accessory is great. Maybe consider including a 2 cm set up block with the kit to help with calibration? Overall, completely happy with the fence system. Glad I chose fence dogs over quad fence dogs as they are perfectly rigid in use, and much easier to set up and remove.
If you are expecting no play, straight out of the box, as I was, you will be disappointed. They sit very snuggly in the dog hole and do not move at the base. But I found that I could not completely eliminate "wobble" at the tip of the dog. This is important for the longer dogs especially if you are cutting thicker material. The "wobble" will allow your rail to move slightly. So I ordered the chamfered collars. I fitted these and they completely solved the issue. Absolutely no play of any kind, the dogs are rock-solid, and sit at a perfect 90 degrees in the dog holes. I am COMPLETELY HAPPY with my purchase. I only dropped a star because I had to buy the accessory chamfered collars to make them work perfectly. They are great dogs, and I would definitely buy them again.
This fence works perfectly. Easy to set up and install. Equally easy to remove. No play in the fence or the stops. Easy to calibrate. It does everything you could ask of a fence system.