Using parts left over from game assembly/disassembly

After disassembling the Crossover game and putting Ringmaster together, I have a lot of excess parts. Many of these aren’t included in a SuperKit. Connector pins with caps on the end, angled pieces I’ve never seen before, large plates from the Crossover baskets, etc. Are all these parts considered OK to use on a robot in competition? The only rule I can find in the manual doesn’t really address this: “The Robot may be constructed using only the VEX IQ platform parts and mechanical/structural components from the VEX Robotics by HEXBUG product line. No other parts will be allowed on the Robot.”

There are a few posts in the official q and a about exactly what we can use. There is no answer yet to any of them. We will have to wait for an official answer.