Sp6 Cerbera slave,, jobs.?

[TailEndCharlie]

Hi folks.
I have a Sp6 cerby, 2000 year. Aprox 30K miles.
Its in need of a replacement clutch slave unit,,, mines sprung a leak..
So.
Would you chaps recommend the upgraded verson, or just re-seal the original.?
Also, other jobs that are worth doing , whilst im in there,
could be,,,,
De-cat the exhaust..?
Replace the rear section of the gearbox with a better unit, ie to remove the TVR linkage.?? Make for a better "feel" to the gear change.?
General clean up, and corrosion check.?
The clutch plate etc seems to have been changed around 10-15K ago, so im not expecting that to be bad.?
I think the slave had work on it then also..

Any thoughts or recomendations will be greatly received.
Ive also posted this on the Cerbera forum ,so sorry for the dual post...
Ta...