I think it's a beautiful wood, almost a shame to paint it! Don't know much about it, is it heavy? I did read that it's quite a bit harder than the mahogany.
This is a place of knowledge, you gleen the knowledge from folks, and we all have opinions, most have experienced true experiences, not all answers to your specific question will help but you can get a direction.
Yes as long as the gauge is ok. Op mentioned it's stuck tho.
I'm not certain how accurate it is but is a useful tool when racing sailboats. It basically allows you to maximize your speed. 1/2 knot makes a difference.