I have a lot of tapes from what I'll call the woodshed period of my songwriting journey. All different genres and qualities - there are a few I'm going to work to digitize - the rest will be in a box.

As to the BIAB part - you have to find or build a style that has a matching groove or feel - that's mainly in the bass and drum tracks, it's pretty easy to match the tempo but without the right groove it still won't sound right.