Are there any limits to the Hit Dice an artificer can apply to Homonculi

Question

I am playing an artificer who is built around improving his homunculi rather than combat and as such I stared looking into ways to improve them, the most obvious being their Hit Dice.

i was wondering if there is a limit to how many hit die I can have on a single Homunculus(Which is an Iron Defender.)

Answer 1

Yes.

Eberron Campaign Setting pg. 32

Artificer

Craft Homunculus (Ex)

An artificer’s homunculus can have as many Hit Dice as his master’s Hit Dice minus 2.