The original maquette of the division Bell heads, carved and painted by Robert Courtney at Model Solutions, Bethnal Green, London. Photograph by Robert Courtney.

The Division Bell heads were made from 8 ft x 4 ft x 2 ft blocks of polystyrene at Model Solutions, Bethnal Green, London. Photograph by Robert Courtney.

How the Division Bell heads were pieced together at Model Solutions, Bethnal Green, London. Photograph by Robert Courtney.

Carving the division Bell heads into shape at Model Solutions, Bethnal Green, London. Photograph by Robert Courtney.

“We’re gonna have to get a bigger workshop!” Photograph by Robert Courtney.

The Division Bell rivets are giant upholstery pins. Hundreds of giant upholstery pins! Photograph by Robert Courtney.

The Division Bell rivets are in, and the heads are ready for painting. Photograph by Robert Courtney.

As a musician, I found that sanding the Division Bell heads produced an incredible sound in the railway arch that housed Model Solutions at the time. I had to record it. Listen below.