Posting this here for anyone who is looking to do this upgrade - it's an excellent, cost effective option. Video is on a TT Mk2 but it applies for anything else in the PQ35 family.

All parts have been locally sourced, so it won't break the bank, with the total coming to <$2000. I did have to wait for the custom top hat and rotor setup but, as you can see, it's so worth the wait.

This will be a direct upgrade for those with steel knuckles/spindles/uprights (and whatever else you want to call them) - the main thing you want here is a thin brake caliper mount. The TT's uprights are 15mm. Anything larger and you will need to change them (i.e. the Passat alloy hubs are 33mm thick).

Audi TT Mk2 Epic Big Brake Upgrade part 2 - 17z Brembo Caliper & Forza 2 piece floating rotor how to



List of brake pad options for both 17z and 18z (working document)