Hi,

First here are 2 pictures of the back once glued :

Yesterday evening, as I was already running into the project, I took the opportunity to glue the 2 spruce pieces of the soundboard.

Here are pictures of the 2 pieces :

I started by making the top sides completely straight. And as for the back I started with a plane against a piece of straight plywood and then I finished with a small plane.

After some hours everything looks great so I can start to glue !
First I check if everything is ok before putting any glue.

And after that, I put the glue, then clamp the pieces and let it dry.

It's all for today !