this is what i have so far. Comment on it and could you give me a hand with squad entries and the like.

Codex: Adeptus Custodes

Special Rules

Blessed – The Emperor blesses every custodian. As such every invulnerable save is increased by +1, so if they didn’t have a save they get a 6+ save and so on.

Guardians – Because the custodians are the Emperor’s Guard they receive the best armour and equipment. Every custodian is equipt with artificer armour and a Guardian spear, consult the following table:

(First mark for power weapon, 2nd for force weapon.)

Companion - -
Sergeant x -
Terminator x -
Shield Captain x -
Constantin x x

Fearless – Any custodian model is fearless.

righto.

i reckon you should drop the 'blessed' rule and give them +1 S,T,I to represent them being better than space marines.

as for the guardian spear i suggest treating it as a nemesis force weapon with a storm bolter.

as for the units

i reckon you should use grey knights for them.

except with a couple of additions:

Lentum Foot nights
veteran grey knights (if thats possible) and drop the storm bolter for a storm shield.

Fulman cavalry
grey knights on bikes, drop the storm bolter and the force weapons couont as if they were being used by sergeants (so power weapons)

that sound perfect to me with those changes

Looks really good so far, though I did like blessed ...

:) MM