I've tried to mark a neighbor's field with a three bottom marker I borrowed from a farmer down the road. I think I got the the thing leveled out,side to side, so the points are all equa-distant when contacting the ground, and my sway blocks are tight. The marker is a heavy piece, a Deere from God knows how long ago. Problem is, it just does not want to dig in with all three points with consistency. It tends to skate along the surface with one of the points - and occasionally two - and gathers sod and debris without creating a good furrow. How sharp or pointed should the marker shoes be? The unit looks like it's been down the field a time or two and the ends of the points are kind of rounded, but I thought there would be enough weight back there that it would dig in anyhow. I've adjusted the 'angle of attack' with the top link, but that does not seem to make any difference. Anybody have any suggestions?