Well when they added Chaos aircraft to 40K and the Aircraft to Gothic I was upset when the Doomwing and the Firelord was not included in the Chaos fleet of air craft.

The Doomwing and Firelord were the Two first flying units that were introduce into the 40K universe.

I bought several doomwings and firelords, when they first was introduced in Epic space marine 2nd edition.

I made a 40K doomwing fighter, and now looking into making a Lord of Fire aka Firelord.