What you've done here is sort of self-discovered some of the prevailing theory about innovation and problem solving.
When I was in grad school, I studied creativity and innovation, and one of the findings was that temporal and geographical displacement actually assist with creative problem solving / innovation. That is, when faced with a problem, removing yourself from it and NOT thinking about it actually allows your subconscious to sort of work on a solution in the background. It's the reason why so many of us have big "ah hahs" when sleeping or in the shower.
Geographical change is also good. Get yourself away from the computer and out of the RV. Everyday, I spend an hour in the late afternoon lying in the grass and reading in Balboa Park in San Diego just to escape whatever I'm working on. Later in the day, I'll mix in some music time similar to your violin time. It's the things OTHER than work that actually make your work more efficient!