I ride a Concor and have had to adjust it so that the nose is a few mm higher than the centre part of the saddle, such that the lowest part of the saddle curve is in line with the back end of the seat post. The nose is still a tiny smidge lower than the lip at the back, but a couple of mm adjustment was enough to stop me from sliding forwards - and has had a significant affect on my comfort on longer rides, especially with shoulders/neck being less stiff.
I ride a Concor and have had to adjust it so that the nose is a few mm higher than the centre part of the saddle, such that the lowest part of the saddle curve is in line with the back end of the seat post. The nose is still a tiny smidge lower than the lip at the back, but a couple of mm adjustment was enough to stop me from sliding forwards - and has had a significant affect on my comfort on longer rides, especially with shoulders/neck being less stiff.