Not sure that you can use rudders with
a twist stick - that was my main reason
to buy a CH FFX rather than the MS FFX.
I used to have a TM set up (FLCS/TQS) and
used it with CH Pro Pedals (my wife and me
have a regular LAN race in NFS3 about who
is going to wash the dishes

).
I own the CH Pro pedals since - uhm - about
3-4 years now and never had to open them;
no spiking either. The ones of my wife are
now one year old and have zero problems.
They are about DEM 200,- here which equals to
roughly USD $110,-. Can't say that I ever
regret it.
Dancer out.