The chisel on the right is unaltered. The blade is 1.5mm wide with a 30 degree bevel. Opposite it is the same chisel reshaped so that the bevel is less than 10 degrees. One millimetre up from the tip the blade is only .25mm thick. The thinner blade displaces less fragile soundboard wood as it is plunged into the cut. Below it is a reshaped chisel that is also ground narrower to 1.1mm wide. By "walking" this chisel around a curved line that has previously been scored it is possible to make a clean cut through the wood without leaving a faceted contour. The straight section are cut through with the 1.5mm chisel. I also have reshaped chisels that are 3 and 4mm that I occasionally use.
When necessary, perhaps while removing a waste portion that is next to a fragile rose element, I will bevel the edge of the waste. This provides more room and less resistance to the chisel as it separates the waste from the rose element.
There is still a lot of work to do. The geometric part of the rose design has a double vein cut into it, the vines need to be contoured and the border needs to be finished. I will do all of that next time.