Assembling the canvas to the jacket

Some speak of using a duplex board. W.W. Chan tailors use the edge of their table. Sator speaks of using a mezzaluna. Cabrera, however, asks you to do it on a flat table.

The forepart is quite plane at the moment. In fact, Cabrera seems to specialize in flat tailoring. Nowhere does he tell you to infuse the canvas with shape while padding. The only thing with shape is the concave shoulder pad and even that is very mild and surprisingly straight depending on the angle of observation.

I need to find a better way to do this.