Implementing this.
The first example makes sense. But the ‘trimmed from end’ works backwards. So it starts and the end and cuts the front of till it is only the last letters showing. But, there is a ‘truncated’ option that works as described.
Unfortunately, the 2nd part regarding the sequential ID numbers isn’t working so well. I tried to do a search for customer id’s (the name of the field to modify) to yield the ‘max’. Then added +1 as you described. I have another user as the ‘anchor’ at 999, so the next user should be 1,000. However, it just ends up being 1. Here are screens of the set up below:
I tried with ‘last item’ as described on this post as well, still no luck. Same result.