Added V.2 models. I find the new design more comfortable. It is a bit lighter beacause it only uses 2 magnets. And the design is better because it should not get loose with time. 

3D printed modification that makes your Logitech G29 paddle shifter more tactile and a bit harder to press. 

For construction you need: 

• 2 x m4 Bolt
• 2 x m4 Nut
• V2: 2 x Neodymium magnet Ø10 x 5mm
• V1: 4 x Neodymium magnet Ø10 x 5mm

How to build:

Just glue the magnets into their holes (when playing with neodymium magnets, be careful, they are brittle), place the two half circles behind the paddles on the steering wheel and after that place the M4 nut in the hexagonal hole and screw both of the sides together. Before fully tightening the screws make sure to position the two halves correctly, then tighten until the contraption doesn't move.