Canvassing a one piece front (CT01)

I've been wanted to try making a one piece front coat for w while and I thought this check cloth would be a good time to try.

I've noticed that there is more distortion to the front edge compared to a 2 piece front. When canvassing should the checks follow a straight line down? If so, the front dart will be curved.

Any tips before attempting this would be very much appreciated. Please advise.

Also, what are the benefits to making with a one piece front? I can understand less distortion below the cross pockets but anything else?

Thank you.

Paul