how can you realize if your cd has got some problem whith the mecanic(transport?)my cdi is old and sometimes i look at it a bit afraid wich are the transport it could accept(cdm...) ,can i buy it on my own (if mine is damaged and if i found a cheaper occasion )or i have to wait for the one the naim service cold give me?

I believe that the CDI can take a CDM4 or CDM9 Pro drive, but you certainly shouldn't attempt to fit this yourself.

Why do you suspect that your CDI has a problem?

Anyway, don't be afraid of it - just use it untill it dies.
My CDI had a new transport fitted last year and sounds great.

Rob.

i have heard the transport to sound strange :too much time to get the track,impossibility sometimes to read some tracks that before are ok,the lens is clean i'm sure,and i have noticed some differences in getting fastly and without strange sound(sometimes the pick up hit loudly somewhere)the tracks if the cd had the right warm up.