I have multiple drawings of different sub-assemblies with balloons to each part, and would like to keep the item numbers all in sequence, with each part having its own unique number.

So far, for each BOM, I take the last number and start the next BOM with the proceeding number, and continue this for all the tables. However, if i take a part out or add a part, I have to manually update the other BOM Tables to start from a different number.

I would prefer, some how this be done automatically, that way, if there are any changes, the other BOMs will update as well.