It's a learning curve.No matter how it is done. The quicker they get the 'ore' controls figured out the quicker they can find new stuff if it is there. The 'ore' in this case is coal. Meanwhile to 'flesh-out' a new discovery the grid drilling pattern system is always used. They say they have found good coal in 3 or 4 different places now. This eventually means 4 grids which may eventually connect .. or maybe not. This seems to be a large prolific area and they are learning more about it with each new hole .. 1 per day. Right now it becomes a race against time to complete the patterns or exploration holes in the wet areas before break-up.