SFTW,
One thing I forgot to address. If you ask someone to help you, you are not doing them a favor by not doing the demo after all because of time. While they might be relieved, it also is very unfullfilling and will not help them with their timidity or fear. Going through it and finishing is what creates the exhilaration of a "near-miss". I would recommend a book you might like. Just PM me if interested.
Basically if you ask them to go through the trouble, and they agree, see it through.