Rolf, Judging by the pictures you've posted of your work, I'd think you would have no trouble at all in learning how to use the Lindsay tool with the foot pedal. You obviously have fine eye/hand coordination, and the foot will follow right along. Right handed or left, makes no difference with that tool.
By the way, I'm right handed, right legged, and Left eye dominate! And I was making decent cuts with my pedal controlled Gravermeister in just a couple days.
John
P.S. Throw in a Lindsay or GRS Ball Vise and you'll be sitting pretty!