I've just begun construction of the Trumpeter PT-76. I have two questions regarding the wheels and the tracks.
1. The Wheel Question: The Wheels have some raised lines in intervals on them. What are these, better yet, are they supposed to be on the sides only? Otherwise, I must carefully sandin between each one, which will take quite some time for 12 wheels.

Should they be on the circumference of the wheel as well? Should I sand the circumference?
2. Aftermarket Tracks. The kit supplied vinyl tracks are not very nice, I should say. Where can I find some decent PT-76 tracks? I saw Miniarm ones at Hobbyeasy but they are out of stock for some time. There's also ARMO ones, but they offer the same tracks for SA-6 and PT-76. Help please?