As it is described at the page you linked: http://web.axelero.hu/mozso/momo_e6.html
, it is not neccessary to take apart the wheel to cure this centering problem.

All you have to do is to download a special MOMO driver update from Logitech's Wingman team: http://www.wingmanteam.com/latest_software/beta_main.htm .


I did, and it solved this problem for me.

Still, thanks for the link to MOZSO's site, without that I probably would take apart the wheel too