No issues with 272 other than we did not get it ROAR approved. We found some improvements and ended up moving on to 276 before we could get it approved due to the delays at the time for ROAR testing. Unfortunately we shipped some units with 272 at that time because we did intend to get ROAR approved or we would not have released it to the public at all. For ROAR racing all units are limited to version 258 which has the exact same spec mode so there is no difference.
We typically do not release any versions that are not ROAR approved to make it easy for our customers and Tech at the races. However 272 does have a new cool feature we call Active Drag. For those that do not care about ROAR legal spec racing and want the Active Drag feature we are happy to give 272 to them. We did not leave it in the public version of the hotwire so people did not unknowingly update to 272 and show up at a race where it matters and saving them the hassle of having to revert to 258 last minute at the race.