From my Mystara Birthright Conversion

As Solmyr's write up

Added new tags for each main clan (Cho for Chossum, Ere for Erendyl, Fea for Feadiel, Gru for Grunalf, LR for Long runner, Mea for Mealidel, & RA for Red Arrow) and gave a Level one Law holding for each clan in their respective provinces, with two exceptions: 1) Red Arrow in Shieldtree got a level 0 one because Shieldtree is only a level 1 province, and 2) I apparently forgot Erendyl Clan (though the Erendyl's did get a Law 0 in Desnae due to Doriath's contacts and connections in Desnae). Gave each clan a level 0 source in their respective provinces, except for Erendyl, which I apparently forgot entirely, and Feadiel and Long Runner got level 1 source holdings. Clan Chossum got a level 0 Guild holding while Feadil clan got a level 0 Temple holding, again in their respective provinces. Added an "mci" tag for "Minor Clans & Independents" and gave them level 0 Law and Source holding in every province. Added an "oe" tag for "Other Elven Spellcasters" and gave them a level 0 Source holding in every province. Added some inconsequential flavor text as an addition to the introduction.

At one point I started a rework of this, but I never got very far, all that came out of it was the following 2 pieces of flavor text: Ainsun and Desnae

no changes

Tweaked the holding levels between Doriath and the individual clans. Split the Erendyl clan into factions- Ere stayed as the "royal faction" under Brendian Erendyl, while the new tag ErD was for the "Erendyl Clan- Doriath faction" under Shurengyla Erendyl. Split the Doriath law holding (4) in Elleromyr into three parts - 2 to Ere, 1 to ErD, and Do retaining 1, thus adding the missing Erendyl clan law holding in Elleromyr, but the Source holding still missing (I think I remember doing that on purpose, assuming the Erendyl source was subsumed into Doriath's holding.) The Ere law holding (0) was changed to the Doriath faction (ErD). Reduced the Fea clan law holding to level 0 but increased their temple holding to level 1. Gave the level to the minor clans tag (mci). I had wanted to give the minor clans a level 1 holding somewhere, and at first I was going to do it in the capital, but wanted to keep the law levels there for fueling intrique between the Erendyl factions, so I ended up giving them the level 1 law in Feador since IMC that is where an exordinate number of the Minor clans are found, including the Clan Taureshey. Reduced the Red Arrow clan Law holding to 0 but increased their source holding to level 2, Giving the vacated law level to Doriath but reducing his source holding there by 1 to 4. Reduced Doriath's Sources in Ainsun and Mealidor by one and gave the vacated levels to the respective clans. Decreased the Umbarth Guild holding in Desnae by 1 inorder to increase the Chossum guild holding to level 1. Also added LTC "Long Striders Trading Company" and gave them a level 0 holding there (and in Greenstone in Rockhome) to represent a blurb mentioned on a page I saw on the vaults. Finally, I added lots of flavor text and some statistics from the Italian demography project. I won't repeat the flavor text here, but the final is thusly:

Key: Do- Doriath (Alfheim); Cho- Clan Chossum (Lynnwyl Chossum); ErD- Clan Erendyl-Doriath 'faction' (Shurengyla Erendyl); Ere- Clan Erendyl-Royal 'faction' (Brendian Erendyl); Fea- Clan Feadiel (Dryadyl Feadiel); Gru- Clan Grunalf (Durifern Widefarer); LR- Clan Nornanda Long Runner (Beasthunter); Mea- Clan Mealidil (Mealidan Mealidil); RA- Clan Pilinkaarne Red Arrow (Redsword Truetalker); mci- Minor Clans & Independents (i.e. Clan Taureshey); ToA- Treekeepers of Alfheim (Jorodrin Feadiel); LTC- Longstriders Trading Company (Dwarves); UH- Umbarth House (Greenleaf Vickers); MH- Mauntea House (Corwyn Mauntea); oe- various Other Elven spellcasters.

ugh…, a mess best forgotten. From what I remeber I just went overboard. I tried to add provinces for each and every minor clan, and tried to add Centaur and Metamorph settlements, and it was just a mess. the only thing that I kept was I change the Feador terrain to Forested Hills.

RoE style with Law split into Law & Manor, and Gulid holdings split between Guild and Trade, with Trade Routes eliminated, along with some other alternative rules (ie natural diffuse + localized or artificial sources, and economic level, etc.)

Added Minor terrain features to each province, and changed Feador to Forested Hills. Increased Ainsun & Elleromyr's total source potential level by 1 and Pinitel's by 2 but decreased Feador & Mealidor by 1. Tweaked source holding levels all around (Mostly juggling around between Doriath and the clans, but also including giving oe a level 1 Source in each province and mci a level 1 in Feador).

Gave each clan a Guild (1) (2 for Chossum) to represent the internal economy of the clanhold. Gave mci various level 1 Law and Manor holdings. Changed the LTC (0) holdings in Trade (1) holdings. Gave Grunalf a level 0 temple holding and a level 1 Guild.

Key: Do- Doriath (Alfheim); Cho- Clan Chossum (Lynnwyl Chossum); ErD- Clan Erendyl-Doriath 'faction' (Shurengyla Erendyl); Ere- Clan Erendyl-Royal 'faction' (Brendian Erendyl); Fea- Clan Feadiel (Dryadyl Feadiel); Gru- Clan Grunalf (Durifern Widefarer); LR- Clan Nornanda Long Runner (Beasthunter); Mea- Clan Mealidil (Mealidan Mealidil); RA- Clan Pilinkaarne Red Arrow (Redsword Truetalker); mci- Minor Clans & Independents (i.e. Clan Taureshey); ToA- Treekeepers of Alfheim (Jorodrin Feadiel); LTC- Longstriders Trading Company (Dwarves); UH- Umbarth House (Greenleaf Vickers); MH- Mauntea House (Corwyn Mauntea); oe- various Other Elven spellcasters.