Brake Upgrade

So looking at upgrading the brakes on my Mk2 Turbo I know the punt GT master cylinder is a popular upgrade but what I cannot find out is if I just need to replace the master cylinder or the air tank as well.

I have found the master cylinder
http://www.ebay.co.uk/itm/400502311694?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

but don't see many assembled with the air tank as well.

THanks

Matt

you need the master cylinder, brake servo and fluid bottle

Would I get any benefit to changing the master cylinder only, not too many servos around.

Won't fit mate

MC that is, not in an Uno servo

also worth mentioning that with the punto gt brake servo and master cylinder the header tank no longer fits