
I've been studying the route for over a year and bought 4 sets of these crossings for my desk. I also bought 2-48" and 2-36" chains from Powertech. This is my first experience with a track of any kind. I found them well done to install and I haven't used them yet but will update as I do. The screws that came with crossovers worked well and I really like the countersunk holes. I bought extra screws from my local store for longer rails as they didn't come with screws. Visual comparison: I noticed that the threads on the Powertech screws are wider and thicker (?) than the ones I bought locally. The heads and length matched and I haven't checked it with my thread identification tool but I'll do that later. I hope to buy more of these with other designs.

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