Simple remix to make the spool clip smaller. I found that there was too much play for the Prusa PLA, AIO Robotics PLA and PETG, and Inland PLA spools.
These files reduce the opening by 1 mm and 0.75 mm:
Smaller_opening_075_mm = 1.75 mm gap (aka 1.75mm spool thickness)
Smaller_opening_1_mm = 1.5 mm gap (aka 1.5mm spool thickness)
(Opening will vary based upon your printer resolution and "squish")
Most of my spools were slightly thicker than 1.5mm but the smaller opening provided a snug fit.