Spruce top thickness?

I am replacing the top of an ukulele with a spruce soundboard I ordered. It's currently guitar thickness; I know I'll have to thin it down for a soprano uke.

I can measure the thicknesses of my current ukes, but I don't have any spruce, only mahogany and koa. I'm assuming the softer spruce should be thicker than those hard woods.

The soprano is going to be tuned to D rather than C, so it's going to be concert tension. Anybody know how thick to make a spruce uke top?

My kala spruce top concert scale travel uke's top is 1/16" at the soundhole. Might be a bit thicker further in, I'll measure when I find my calipers.

I've owned a few spruce-topped sopranos (a Larrivee, a DaSilva, and a Third Wave), and yes- they've all had thicker tops than I'm used to. So I guess your hypothesis is right. They were all fantastic sounding ukuleles. Alas- I don't own any of them now, so I can't take a measurement for you, just corroborate your theory.

with spruce tops, thick is the key