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I did a retro-fit from a 502 Mighty Mule. It wasn't easy and required some custom brackets (the Mighty Mule ones were previously welded into place on the gate). The vehicle sensor (pressure plate) from the Mighty Mule works well. I asked for technical help on the wiring. YOu sometimes have to call several times but I did get tech support when needed. Although tedious to retro-fit, it has been working well for 2 months. I did not buy the GC battery box. I bought one from my local electrical supply store that held 3 batteries. My overall take on it is it is reliable but slow.
Verified purchase: Yes | Condition: New
Easy to install and seems to be of good quality. The installation instructions are very thorough. Speed is just right to not be annoying but slow enough to be safe. An excellent value!
Verified purchase: Yes | Condition: New