I need flat pack furniture instructional drawings

Design details: As the title suggest, we are launching a new range of flat pack furniture where only the length of the product will change.
I need an instructional assembly sheet designed that will be uniform irrespective of which size the customer chooses.
Attached is the assembly sheet for our current range, which we are happy with, however the new range requires specific steps for assembly.
Ideas for the visual style: Basic
Where the design will be used: Print
Extra notes: