How to create a custom Siduction iso

[needle]

Happy Holidays everyone!

Im new to Siduction, already a month daily driving, installed on various PCs and Laptops and quiet surprised how good it is!

Sorry if this is somewhere documented or mentioned before but I couldnt find it:

How can I customize my own siduction iso?
So I can maybe add some extra packages and apps to be installed  etc...

How do you guys create the default iso?

Thanks!