This is a simple shifter mod for the Logitech G29.

For this mod, you will need two springs (linked).

1. After printing out the parts, glue the springs in place (I used hot glue).
2. Next, unscrew the six screws on top of the shifter and slide it upwards.
3. You should now be able to insert the two parts. It might be a bit tricky if the springs are new, but with a bit of patience, it should be no problem.
4. Finally, put the plastic frame back in place and screw the six screws back in.