2 seasons ago i bought new Cannon Digi troll with the bottom Trac feature. I was just gonna buy the stx, but their was no speed control and they'd snap at the top of the water. Didn't like that one bit and bought the digi's. Many different speeds and I can track bottom without touching a thing. Guys that have fished with me LOVE that feature. Sent from my SM-N950U using Lake Ontario United mobile app