Some time next week the programmer will complete an update for updating ball samples. The superior method is polynomials, but you can reduce accuracy if you don’t do it properly. If you are unsure of what to do, then "auto update" or "auto update 2" are better options. The upcoming mod will allow you to use polynomials in a much more hands-free way. Basically you’ll update the ball sample in the same way as "auto update", and will just watch the max deviation value to ensure it remains low enough. If it is too high, the value will be red. With the mod you should still monitor raw prediction accuracy, but there’s unlikely to be any problem if you just watch the max. deviation value. The update should be ready by the end of next week.