I have been scavenging lately for some items that would be great for rails. This is what I got today. In back of my school, i found a 10' wide, 35' long metal bench seat. It's from the seating they use at our football field and i guess they didn't want this one so i took it. I also got metal playground slide that will work very well to grind. Then i found 2 20' long metal pipes. The last thing i found was a 16' long plastic c-rail thing, I have no idea where it came from, but it is perfect.
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REMEMBER: It's 10% equipment, and 90% rider.