I'm at a loss why my PT SL 2.4 readings will randomly fly off the scale in the middle of the ride. Obviously not because of my paltry poweroutput, lol. This PT unit I bought as a back-up last fall, has less than 400 mi on it, never rode it in the rain. I've installed new batteries in the hub & cpu, but the problem recurrs. It's happened both in cool weather (<50F) and warmer weather(>70F). I'm able to zero torque at the start of every ride, but after the readings go haywire, torque would not go below 500watts even when coasting. Is it time to send it back to Saris?