Progress DB: Incremental Backups

Our v8 database is currently 19GB (with only 3.5 years data so I don't really want to archive off just yet). After a test conversion to Epicor9 this grew to 33GB!! As you can imagine, it's not very practical to upload an online backup of this every day.

So, is anyone using incremental backups with the Progress/OpenEdge database? How have they worked for you? How easy is it to restore these backups?