Hi Marksman ,
Thank you very much for your post and for using Product Levels.
Yes, as you said, we have thought about this already in deed. The problem is that as of now we are not ready to add this in. All the other BOM as fees, taxes, labour cost will be added lot later on the PL expanding process and will be connected to our COG plugin we plan for 2020.
I know this seems very distinct, but we have our plan and very limited resources. Hope you understand.
The only way I can see this working for your, but not fixing everything you need to do is to create a Raw Material or a Product Part called FEE?