I just bought a Lamino Chair, designed by Yngve Ekstrom. It is dated AUG 1965, and it has the brown sheepskin seat material. The chair is in excellent condition except for a few spots of the sheepskin where it has worn through through. Does anyone have any opinion as to what might happen to the value if I replace the original sheepskin with a new leather? What about repairing the sheepskin?... does that sound like a reasonable thing to do?