A couple of even 8-beat acoustic guitar Realtracks at 75 bpm would be useful.

The 65 bpm RTs do not always compress to 75 bpm artifact free and, similarly, the 85 bpm RTs do not always stretch to 75 bpm artifact free.

I personally find the simple, even 8-beat acoustic RTs very useful foundation tracks for developing a backing.
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LINKS TO MY BIAB/RB SONGS