This mod adds a better feel to both sequential and regular h shift feel for the logitech shifter.  
Once the h-shifter is installed, removal and installation of the sequential mod takes around 10 seconds.  
This mod of course can be used without the magnets, however I highly recommend using the magnets for the better shift feel.
This can be printed in any material with minimal supports, I used auto generated tree supports.  

Thanks to Manifold3D for the original h-shifter design, which I modified to fit my mod.

Hardware needed:

8x  8mmx2mm magnets (I can make modifications for other sizes if requested in the comments)
1x Rubber band (Heavy duty preferred, but not necessary)