Experimenting with replacing the belts in the TEAC W-1200 cassette deck (a.k.a. TASCAM 202mkVII) to see if it can reduce the wow & flutter and improve its performance. The correct sizes turned out to be SCX 5.1 and SCY 4.6. Changing the belts is easy, but order extras, because as I show, you may need to experiment with several to find ones that deliver the best performance.