Main (free) (+ 4 detachments)
4 hq
10x tactical
10x tactical
15x despoilers

Warlord (free)
1x Command Squad
1x Land Raider

Officer Cadre (+1 detachment)
2 centurions

Officer Cadre (+1 detachment)
2 centurions

Tactical Support (-1 detachment)
10x Havocs
10x Tactical Rotor Cannons

Armored Support (-1 detachment)
2x Vindicators

Armored Fist (-1 detachment)
1x Land Raider

Shock Assault (-1 detachment)
2x5 Terminators

Heavy Support (-1 detachment)
2x Contemptors

Heavy Support (-1 detachment)
2x Iron Circle

So let me get this straight, I need 8 hqs to run my old 2.0 army just because I need to spend 1 detachment to get 2 detachments with officer cadre?