a im new here, and new at sledding, over the weekend i bought a 87 A.C. jag 440, just kinda doing some maintiance on it and noticed a couple of things that im not sure about so maybe some of you may know, ive noticed that the disc on my brake system has some play side to side, not rotational on the shaft, i think this is normal because the pads are stationary ? its not alot but i was just wondering, im gonna put new brake pads in anyhow, also when i was adjusting the track, my slides are still good for this year but over next summer id like to change them, whats the process for doing that,?, is it hard to do? it seems like thats the biggest wear item that i see, mind you im kinda learning as i go here, so please bear with me. thanks