Hi. Peter:We enjoy your TV6 spots.My Question is when setting the seed bed height for a new lawn, say next to a cement driveway, sidewalk or patio, how far below the noted surfaces should the soil grass seed bed be, so that when the grass develops, the grass base is close to the level of the side walk, drive or patio surface. I am trying to avoid the step up or down ,,, stumble factor if possible.Thanks for your. RSVPSincerely,Richard in Springfield Center, NY