Overview
Small update, just learning more about the modding ability and decided to add a couple small changes I believed were more or less finished. Planning for a much larger update soon to revamp Flanders' starting situation government wise, to reflect the immense power the Cities had in comparison to other states.
Also planning to revamp the event chain, adding more content to the chain overall and to better organize it.
From here on, outside of bug fixes, updates will likely be more infrequent yet have much more content.

Additions

• "Urban Charters of Autonomy" New Burgher Estate Privilege that Flanders and Brabant start with, that is difficult to remove, provides a lot of burgher estate power. Will likely add more especially to the Burghers.
  
  
• Modified Flanders starting values. Towards Plutocracy, Free Subjects, and Capital Economy.

Bug Fixes

• Fixed an issue where if Louis I was not dead, and you picked the Dampierre's to return, it would break the PUs Flanders begins with Nevers and Rethel, unable to regain them.
  
  
• Fixed the French reaction event not having correct localization.
  
  
• Corrected numerous other small localization errors in the code that were creating entries in the error log, mostly just leftovers, ie having a custom tooltip that was never implemented.

Additions

• New Event inspired by the 1376 flood, significantly damaging the province of Hulst.
  
  
• Thanks to @Legion, Duke of Rockford for finding out you can modify character life expectancy, the mod now utilizes PDX's default Jacob Van Artevelde.
  
  
• Modified the "Succession of Flanders" event. The choice for picking alternative nobility outside of the Dampierre's
  no longer requires both Louis I and Louis II to not be alive. Instead picking this choice with either one being alive incurs a legitimacy penalty.

Bug Fixes

• Fixed the english_wool_embargo modifier not properly removing after picking Neutrality in the Brewer of Ghent event.
  Cause: = { english_wool_embargo } instead of = english_wool_embargo
  
  
• Fixed two localization errors. Initial Flanders Event, Brewer of Ghent event, and the Flemish reaction to the English Embargo

Bugs Currently Being Resolved

• After returning the Dampierre's at the end of the event chain, the PUs with the holdings in France are lost. Theory is its a result of EU5 not correctly
  maintaining PUs in what is a weird edge case in game, a ruler of a vassal state having an heir rule elsewhere. Cannot form PUs with vassals, so if Louis II is chosen to return in the event, and Louis I is still alive the PU breaks and cannot be reformed. Will rework logic for the option to be Louis I instead if he's alive. May look into creating a custom vassal type similar to the appanage but slightly modified for non-dynastic.
  
  
• France's reaction event to Flanders joining the English side missing localization for the desc. Will resolve in update tomorrow.
  
  
• Two Jacob Van Arteveldes spawning. Since he starts the game at his life expectancy, I created a 2nd Jacob for use in the event chain. Patchwork fix applied, will look for a more permanent fix tomorrow.

Overview

• Added many new DHEs to Flanders that aren't related to an event chain.
  
• Changed Thumbnail. Credit @SEPB66 On Wikipedia for the Flanders Coat of Arms in the thumbnail.
  
• Name changed to Legacy of Golden Spurs to more accurately reflect the scope of the mod, will likely make a separate mod for Brittany later
  
• Removed the small edits made for other countries. Will add Hainaut back in this mod as a DHE.

• Saint John's Hospital: Constructs a hospital in Bruges, from game start.
  
• Saint Martin's Cathedral: Constructs a cathedral in Ypres, after 1360.
  
• Stilting of Bruges: Negative event for the Bruges location, after 1400
  
• Saint Donatian's Cathedral: Constructs a cathedral in Bruges, after 1380.

Version 3.2

• Some bug fixes

Overview

• Added four new advances unique to Flanders, with a few also available to the Netherlands
  
• Tweaked some other values slightly

• Flemish Urban Militia: +100% Burgher Levy Size, +10% Levy Combat Efficiency
  
• Guild Brotherhood: +2.5% Burgher Satisfaction, +0.10 Migration Attraction
  
• Flemish Waterways: -5% Urban Buildings Cost, +0.10% Monthly Prosperity, +NED
  
• Flemish Belfires: +10% Fort Defense, +20% Recruitment Speed, +NED

Version 3.0

• Added the Flemish Gamble event chain
  
• Flanders now has a large event chain detailing their engagement with the beginning of the HYW
  
• Events such as the Burgher Revolt against Louis I, The English Embargo, and the Flanders' Succession Crisis are faithfully implemented
  
• Unique government reform for Flanders if The Brewer maintains control

Version 2.1

• Added Flavor event to France as reaction to Flanders switching sides
  
• Event gives/subtracts legitimacy now for ENG,FRA respectively instead of prestige. Representing the English claim becoming more respected on the continent.
  
• Added additional historical info to the events.

Version 2.0

• Edited Flanders' HYW event so it will actually fire now, and if they pick the historical option they become a vassal of England
  
• May look to expand upon this later into a proper chain, with Flanders going from French Vassal -> Neutral -> English vassal. A player for example could simply stop at neutral.
  
• Spanish localization for events. I am not a high level/fluent Spanish speaker, used AI to correct what was baby Spanish I coded. Let me know if its incorrect. (Only usage of AI in mod)