Ok, the Elemental 5-packs inspired me to write down all the errata I think I've found in my Dark Age research deep dive. I tried to organize by the likelihood it's legit errata...
Definitely ErrataFirebee 1E: Delete Canopus, Fronc availability in E-Republic (duplicative with Periphery-Gen)
Firestarter M3: Fronc availability in DA era redundant with Periphery-Gen availability
Firestarter M4: Should not have E-Republic availability (Intro date = 3109)
Assassin 23: Either A) Fronc availability is duplicative in E/L-Republic eras with Periphery-Gen, or B) Periphery-Gen is in error (since it’s eventually extinct).
Clint 2-3U: Either A) Fronc availability is duplicative in E-Republic era with Periphery-Gen, or B) Periphery-Gen is in error and should be replaced with Canopus and Taurians.
Goshawk 6: has an Intro date (2840) earlier than the original Goshawk (2863)
Shadow Hawk 4H: needs availability in E-Republic era (Intro date = 3097).
Shadow Hawk 7H: should not have any availability in E-Republic era (Intro date = 3101). Not sure if more limited availabilities should be moved to L-Republic era or not
Rifleman 3Cr: mention and record sheet is only in TRO3085(-PP). No mention of it or RS in RG08
Multiple Units (FWL Dark Age issue):There are a few units with Intro dates < 3139 and Dark Age availability to FWL, but no Dark Age availability individual FWL-states (but should have these since they were around before reunification). Some examples are the
Hermit Crab (all variants),
Scourge WF1, and
Locust 3M.
If the MUL team has better filtering skills than I do, the way to find these would be the units with:
0 <= Introduction <= 3138 AND Dark Age availability = FWL AND (DA availability NOT = {Tamarind OR Oriente OR, etc.})
There also seems to be some with the reverse (individual FWL state availability but no FWL availability in DA). The
Goliath 3M2 is an example. This might not be errata, though, since these may reflect extinction before 3139.
Pretty Sure It’s Errata
Locust IIC 3: Should have Capellan and FWL availability during Civil War and Jihad eras (RG16: “After its proliferation following Operation Bulldog, this was one of the most common Clan ’Mechs within the Free Worlds League and Capellan Confederation well into the Jihad.”)
Griffin 3N: Pretty sure E-Republic availability should be Regulus, not Marik-Stewart (produced on Tiber in Reg-Fiefs, according to RG01)
Griffin 5L: Should have Canopus availability (in all eras) according to TRO3085 (“These GRF-5L variants were shared with the Magistracy of Canopus, but not with the Taurian Concordat.”)
Merlin 1A and
1B: I think these should have Raven Alliance availability for E/L-Republic and DA eras. They do not have access to Periphery-Gen list (as the Outworlds All. did)
Warhammer 5L: Should have Canopus availability (in all eras) according to TRO3085 (“A joint venture between the Magistracy and the Capellan Confederation, the WHM-5L trades in its PPCs for plasma rifles.”)
May or May Not Be Errata
Sphinx 3 and
4: Should Sea Foxes have availability in DA era? TR3145 (NTNU): “…Clan Sea Fox still sells both.”
Rifleman IIC 2: Is Merc, Kell Hounds, Solaris availability during Jihad era errata? It’s the only IS availability in any era and I couldn’t find a source to suggest it.
Hector 1B: Is this really reintro in 3075? I could not for the life of me find a reference to its revival ED: Age of War, any of the Jihad sourcebooks (including Obj: FWL), or any Dark Age sourcebooks
Longbow 7V: Are HW Clan/Stone Lion/Society availabilities during Jihad errata? It’s not an SLDF or Vicore variant (so no secret Wobbie shipments), so I didn’t see anything to suggest they’d have it.
Night Wolf (std): should Hell’s Horses have DA era availability added? (produced at Weingarten, TR3085).
Potential missing availabilities of capturing factions
Pandora (Red Devil): Should Lyrans have
Rifleman C 2 available in DA? Tamar Rising (p. 29) suggests Riflemans were still being churned out in 3151, and possibly as far back as Lyran occupation (RG08 suggests the C 3 is a Sea Fox export variant).
Tikonov (Earthwerks): Should Davion have Dark Age availability of
Koschei 5I and
5X,
Quickdraw 8P and/or
Cataphract 5L? They have it for
Thunderbolt 12R and held the world for years.
Marduk (Victory): Should Davion have Dark Age availability of
Firestarter-O omni and
Wolverine 9K? They have it for all other ‘Mechs produced on Marduk during Dark Age (
Griffin 5K, Orochi 2I, Black Hawk and
Avatar omnis).
Terra Firma (Bander BM): Should Capellans have
Bandersnatch (
1Ar and/or
1B) availability in DA era? They have availabilities for
Scorpion 1TB and
1BR produced there (and
Crusader 9BR with rest of IS)