[cadandcookies]

Ohhhhh boy, pit designs.

First off, it looks pretty good, and you did a nice render! (I'm not really sure how the front corner managed to get cut off, but that's a different thing)

Structurally, like George said, you definitely need some diagonal bracing in there. I would recommend doing this with sheets of plywood or something of the like attached to the PVC in the corners-- this will also give you a better place to mount lighting and such. You can also have a dedicated electronics panel for the arduino controlling the LEDS attached to one of these. When you're adding lighting, make sure to plan out your wiring-- nothing is more irritating/dangerous than wires falling out all over the place.

I would also recommend having some sort of flat baseplates that can attach to the bottom of the structure. Team 2220 has a different type of pit (a very nice metal truss pit that one of our sponsors partially donated to us), and the steel baseplates are a huge part of keeping the structure stable.

My other recommendation is to plan for how you're going to store, transport, and assemble the pit. Having some of the parts preassembled may allow you to save time on setup and also glue some of the joints, which will help with keeping everything together. Of course this comes at a cost of space during transport, but it's definitely something to consider.

Overall, it looks like an awesome low-cost pit structure-- I hope I get to see it at Championships this year!