How wide our the rails and stiles on your shaker doors?
I'm linking a thread below from earlier this year on the subject.
Here is a link that might be useful: Stiles and rails
One more from this year.
Here is a link that might be useful: Another thread
Usually, a minimum is 2-1/4", mostly for the stiles. Rails can be thinner. I have been doing more 3-1/4" wide with a thumbnail inside edge lately. Same shaker panel.