Customify ‑ Custom Product App

I have looked at a number of customisation apps for shopify but have found Customify to be the most flexible for me and for what i want to achieve.
I have a lot of wood products which can be laser engraved, I wanted the ability to charge depending on the complexity of customer customisations as well as on multiple sides of the products.
The support have been amazing in helping and providing some extra enhancements and is quick to respond.
The only thing I would like is a more complete help guide in understanding what all the functions and options actually do - as I don't use them all, and don't know what some of them do.