People who never played semisolids like a Guild Starfire or EB2, often don't realise how deep the body in the middle is. The sides may have a P-ish thickness, but you have domes at the back and front. So the middle part is so much deeper than the sides and that's where the center block is. A guild Starfire (or EB2) isn't a light bass at all! Same for similar basses as the Hagstrom Swede, Warwick Star Bass, etc.