[DaveBlake]

Yes artist relationshp to song is many to many, resolved by song_artist.

Well so far my attempts to get a test build from jenkins have been a bust. First it gets aborted, then it has a random fails (that happens), then it succeeds but I forgot to tick to upload, then the servers are busy, then I loose internet in storms....

Shish! If the servers are quiet later today I'll have another go. But if you get your own build to test before then that is great practice