I just realized, that on the my word page we have now the additional tab: customs definition - great.
Can we have in addition on this tab 2 buttons: Mark All and Delete Marked plus the tickboxes per item like in the my word list. In this case, we could delete our customs definition and return to the standard. I have now more than 500 items there (just from April / May) and most of them are equal to the standard by now (but not all, so please don't delete my customs definition automatically).
I think, this could apply also for mnemonics, so that we not only can create items, but also get rid of them, once we don't need them any longer.

I can put something like this in those pages. This would be fairly low priority, though, so it probably won't happen for a while. If you need to make changes sooner rather than later, I could send you a list of your custom defns, you would delete the rows you still want, then send me back the list and I'll delete them.

Scotts, thanks. I still can go ahead for the time being. I might come back in a month or two, once I have made all my definitions into Baller and then we can delete all of them. Hope that this keeps your efforts at a reasonable level.