Tanning a sheep skin

[GravityKills]

I am a loyal user of Krowtann, but only have tanned for mounting purposes. I have a nice sheep skin I want to rug out. Can I do this by tanning with Krowtann then breaking the skin, or do I have to use other methods (pickling, tanning, oiling, breaking, etc.)?

Also, I am building a tumbler, but do not have the motor atached yet. I hand turn it for birds, since they only take 10 - 20 minutes. How long would I need to tumble a small sheepskin. It is not very big, I caped out the head for mounting, so I am left with a small rug witht the tail.

Thanks for the advise!