Hi Steve, Just played your YouTube video on your coup perdu movement.
Looks great. Not too sure if my wife will agree to another clock in our living room.
Anyway, considering the fact that this is going to be a desktop clock and that the weight required is small, this would mean that the winding of the weight will be interesting to give a long runtime. Are you looking at using a small geared motor to provide the energy to wind the weight up every few minutes.