Top and back radius

Good question.  Let’s see what we can find out

Pretty much every acoustic guitar made these days has a radiused back and top –  the amount will vary, but the mechanical advantages that radiusing offers is almost impossible to ignore. When a radiused top dries out, it will flatten out before it splits – a flat top will just split. When a radiused top gets over humidified, it will raise before it cracks other parts – a flat top won’t –  a radiused top allows you to build lighter in thicknesses and structure, which lets them make a more responsive guitar –

What radius  SCGC uses I can’t remember, or don’t care about – I’m confident that whatever Richard has decided is best for SCGC is whats best. And I don’t know if it’s changed over the years, or if it’s different for different size bodies. But I’m pretty sure Richard would be happy to tell you if he’s asked –