Colour Selection using negative parts

That is an IQEX rather than an IDEX.

Can I assume you will be performing some post-processing work?

This is a huge rabbit hole I do not have time to wander down. I wish you luck though.

However, I doubt this is the forum for you. No BL printer has Idex, let alone IQEX. The community members here might not be your best audience.

You should look for forums that specialise in build-your-own solutions.