I'm trying to modify some aluminium profile (Bosch Rexroth, but 80/20 is similar) for use as a heatsink for 4x Pololu stepper motor driver boards. It may or may not work as planned!Cut off some of the profile to leave a small enough strip to mate with the A4983 chip without fouling / shorting the rest of the board. Use chopped off tool clips to hold the Pololu boards in place with thermal paste between the board and the profile, and insulation between the clip and the board. Optionally add a heatsink fan.