Hi all, I’m planning to recess the top of our stem wall by 1” to allow for a zero-threshold patio door, but not sure what length to recess.  We’ve engineered the framing plan for a 10’ wide opening onto the patio, allowing for a 72” double hinged door, plus 2 sidelights.  We haven’t picked a door manufacturer and I understand the “standard”  sidelight widths can vary a bit. 

Is it ok to just recess the 10’ length of stem wall, and just order a custom door package later so it fits? Or is there a common standard width for this design (double 36” doors +2 sidelights)?
Thanks! I’ve attached the relevant framing elevation. 
Adam