Locking tweezers like these come in handy. https://www.amazon.com/dp/B089G4DW3X/ref=cm_sw_r_cp_api_glt_i_XJW67NHXDWV60VKE6372?_encoding=UTF8&psc=1

I replaced all below the bed. There are a few tips in the replacement process. 1. These tweezers helped a lot with reattaching the belts. 2. When you're reinserting the bed to the base, be careful. The corners of the slot can dig into the V-Wheels. 3. Don't skip rolling the bed back and forth 20x. This evenly distributes the belt tension. 4. When tightening the eccentric nuts, move the bed and then rotate the eccentric nuts just a little. Repeat that until the movement(wobble) disappears.