Do you like to add sequence number at the time of export or in the Library module itself?
May I also know the version of Lightroom?
I like to do it the library module. I am on LR cc 6.x
Thanks. Will I then be able to rename the files back to the original file name? Will LR " know" what it was and extract it from the composite name that I created with your recipe?
No you have to again rename them to the original file name.