You'll want to tightly lace the saddle to minimize the hammock effect. A properly laced B17 shouldn't look like a hammock. Also check out the Brooks Pro (about $90). It's a little narrower than the B17, but is very resistant to sagging. Also lace the Pro per my guide.

Use Harbor Freight P/N 97715 (5/64" setting) to punch holes. Keep tool perpendicular to edge of saddle. 0.425" from bottom edge of flaps, and 0.300" spacing with 14 evenly spaced holes . First hole 3.5" from the nose of the saddle.

Tilt the nose up until your sit bones are positioned at the widest part of the saddle. The height difference between the nose and rear of the saddle should be between 1/4" and 7/8". Use the absolute minimum amount of tilt to avoid sliding into the front of the saddle.