I will definitely do that as soon as I have some after market magnets. The package is waiting for me at the post office, so I'll probably get to it during the weekend.
As in how did I attach the magnets? As I wrote in my original post I went after what Pilotasso had originally posted here. Got rid of the plastic magnet mount and put them beneath the hall sensor leaving a gap off aprox. 2-3 mm.
I'll make some pics next time I open the stick.
BTW. I found this ready made, print it yourself plastic part to increase the spring tension.
http://www.thingiverse.com/thing:19253
Don't you just love the world of 3D printing? Now to find a place to print it :)