The majority of RC would be just fine with two equipment choices Mod(open) and stock. Mod would be completely open run whatever you want. Also registration would not be completely open. You would have to prove yourself in the stock class first. The stock class no boost ESC and 17.5 motors with motor timing allowed. Lets people get used to adjusting timing. If you want to make the A main of stock you need to be a decent driver and have some understanding of how to adjust your motor. If you want to go faster than stock prove yourself first then move up to mod. No more hand holding of those that think mod is to fast but stock is to slow. Put rules in place to keep people moving forward. Those that just find a nice comfortable place and do not really want to push themselves to improve drastically that is where a full spec class comes in. Racing touring car or 1/12th you should be pushing to be at the top and making the steps to get there.