Correcting wood cupping

My bass’ body developed a slight cup over time, after glueing the laminates… here I’m trying to get it back to flat again… I moistened the top and clamped it like this:

In the meantime, I will work on the fingerboard (planing, cutting), cutting the fret slots, gleuing the fingerboard on the neck (have to install the truss rod before I do that.. shouldn’t forget.. making mental note..) and do some radiusing. I can even start shaping the neck profile, so I don’t have to get bored while the body is in the clamps for a few weeks.