If anyone is using 2 falcon 500s in a gearbox and has aluminum gearing I highly recommend swapping them out for steel gears. At the la regional my team 4501 fully stripped 2 20dp 20t aluminum spur gears. At the same event 2637 using aluminum gears in a dual falcon 500 gearbox also stripped their 14t gear. It may only be for the small gears but if you have the weight I highly recommend swapping all the gearing out. If not, at least do it for the small gears. WCP is currently in stock in most steel gearing. We checked before our last match as this had just happened on the other side of our gearbox and the gear was fine. This is what it looked like after that match.
Some people asked for gearing specifics. We are using the wcp ss flipped gearboxes with 2 falcons and 10t steel falcon pinions. Gearing is 10:60 20:36 32:34 the 20t is the one that shredded