The pattern of "The House of the Rising Sun" (Am C D F) is also helpful; once you've internalized such progressions and have basic patterns in your ear, you recognize them and can harmonize a piece.
From what I gathered, the following should be done to keep the piano in good condition: No direct exposure to sun light, moon light, heat source nor air conditioner. An average temperature of 20°C,
Perhaps the following analogy may help: think of a planet orbiting a sun on an elliptical orbit. When the distance (analogue of LFO output) between the planet and the sun decreases, the gravitational pull increases, so the planet velocity (analogue of rate) increases. As the planet moves faster, the distance to the sun decreases even faster etc.
If you must leave the instrument in the car, park in the shade and leave the windows cracked. Put the instrument out of the sun, either in the trunk or under a blanket if you don't have a trunk. But bringing it with you is a much safer idea.
Another example of an artistic use of capo is “Here Comes the Sun” by The Beatles and written by George Harrison. The song is in A and the chords can easily be played using open chords down by the nut, but instead Harrison chose to put the capo on the 7th fret and play it in D.
i keep a jazz bass in my small car, through snow and sun alike - it has suffered exactly zero side effects or harm, it has nitro paint so should be more vulnerable to fluctuations. It might be helpful if the OP stated his location/ climactic situation as this would be inadvisable in say, Alaska, or new Mexico. Check your car insurance for any special conditions of storage.