For official, high level play:
>• Models cannot be converted in such a way that any part of
the model represents the intellectual property of any party
except Privateer Press, including copyrighted logos, symbols,
iconic elements, or other iconography.
>• The majority of a converted model’s volume must be
composed of parts from Privateer Press models. To avoid
confusion, the conversion should include iconic elements of
the model it is intended to represent.
>• A weapon on a model can be converted as long as the
conversion represents the same type of weapon (e.g., the
model’s axe is still an axe and not a hammer).
>• A weapon can be completely swapped for another weapon
as long as the new weapon is of the same type (e.g., an axe
for an axe, a rifle for a rifle).
>• A weapon cannot be removed unless it is replaced by another
weapon; conversely, a weapon cannot be added unless it
replaces a weapon that was removed.
>• If a conversion uses a Privateer Press upgrade kit for the
model it is intended to represent, all parts of the upgrade kit
must be clearly visible on the model.
>• Models must be mounted on appropriately sized roundlipped
bases. Added scenic details can overhang the base’s
edge but must not obscure the edge in a way that makes
accurate measuring during a game difficult or impossible.
>• A player cannot use a model as a proxy (stand-in) for
another model.
>• Any conversions must be clearly pointed out to the opponent
before the game, and the end result of any conversion must
be clearly identifiable as the intended model."
For at home/casually/both: You can do whatever. A simple helmet swap would be fine in both cases. I did it myself plenty of times.
>And is there a faction I absolutly need to avoid or is it mostly balanced?
If you're just starting, everyone is fine (Trolls have the weakest starter box). If you're planning to get into it deeply, Cryx is overpowered if you abuse certain model combinations.
