Making a loan for purchasing income property from Solo 401k ..

[LEONID ORLOV]

I am contemplating to make a loan from my solo 401k to a friend.
The loan will be secured by the property.

I would be interested in a word of wisdom on how it is properly done to avoid trouble with IRS and/or loosing tax exempt status of the funds.

What paperwork is sufficient? do I need to put solo 401k on deed of the property?
Any advice or personal experience would be appreciated