I have a product A that is comprised of (2) of product B and (1) of product C. 

I am trying to set up an BoM with an operation to produce products B and C. 

The actual operation is a batch laser cutting operation that takes one sheet of plywood as an input component and produces (4) of B and (3) of C. 

But operations (and BoMs) appear to only be for a single product. How can I set up Odoo to allow a manufacturing operation like the one I described? 

I tried using byproducts but get an error that a byproduct cannot be the same as the BoM product.

Thanks!