Here’s the repeat pattern process, you can find a full explanation on how to create your own here - http://www.designsponge.com/2008/05/welcome-julia-and-how-to-make-a-repeat-pattern.html
I’ve been using the same process except I scan in the first piece,
do all of the chopping up digitally and then print out to fill in the middle part.
Saves any worry about cutting it up wrong, makes lining up easier too, no scissors and tape.
Looking forward to seeing this thing go onto production!