I'll lend any of my instruments to anyone as long as I'm there watching it. However, as a professional of 30 years standing, I have no problem lending an instrument to another pro for as long as they need it. And at sessions, I will offer my instrument to anyone who needs it for a song or two. I've found that it is sometimes difficult to listen to a song and watch your instrument like a hawk at the same time. All the best. Seamus