Premonition rather than prediction really

Most sources suggest 1100s

Hanging on the wall of my local guitar store about 15 years ago.

I would re think your seating posture. You're probably trapping a nerve or something which means your posture is not relaxed. Also consider alternating between sitting and standing especially if you're playing electric.

Because the US doesn't make engine immobilisers mandatory like the rest of the world does