Better brake setup

Well aware of the shared reservoir for other unfortunate reasons...

The clutch pedal does squeak a bit since the super blue, but it doesn't bother me. The squeak is more noticeable at low speeds. Will see how it performs on a track day.
 
the dye effects the seals in the slave cylinder and apparently has caused peoples to fail. iirc is it's about £60ish for the part plus of course labour and new fluid etc. so if you have the squeak just swap back sooner i would say.

(btw the pedal itself on these cars can have a squeak too however it's separate to that, but it should be pretty obvious if it is the pedal itself)