Before we got into sprint cars and yes we run a 305 at 34 raceway but not a racesaver LoL, We raced karts all over, and we always used a transponder I have often wondered why most of the local tracks have not used them. Well if we start using them at our local track we already got one. I think it is a great idea, but before we had one we had to rent one from the track. I feel if they want you to use one they should give it to you. Or if you got one use your own. It does speed up the program. I also feel the payout is pretty good for a 305. Good Luck to everyone who runs one this year.