So i'm looking through a bunch of stuff and can't track down the exact intro dates for the clanspec double heatsinks, endo-steel, or ferro fibrous armor. TechManual gives the dates for the IS (including reintroduction), but omits the clan versions. Likewise the items are nowhere to be found on the chart in ED: Golden Century.
Using the intro dates from extant units, I've come up with a ceiling, and those numbers seem to fit in with the rest of clanspec gear. Clan DHS is first seen on the Kraken (Bane) in 2827 and FF/ES showing up a year later on the Marauder IIC in 2828. Is there anything documenting these systems appearing earlier in the decade?