If user loads a god board, only let them change the length, strip changes are locked.
Have an indicator (overlay?) on that section explaining that this is locked because it changes the design and will become a "medusa" board if they wish to proceed and modify it.
block out with simple overlay message “Customize board Woods? Customizing will add additional cost and up to 3 weeks turnaround to your board. [I don’t mind, let me customize it!]”
If clicked, display all wood strips and allow changes.
Show small link at end to reverse all wood changes if user wants to go back to original design and prevent custom charge.