I also think that you would loose a lot a your moisture from your ribs if you make cuts between them. Its just not necessary. If I am trying to cook more racks than normal, I hove been known to stack them up, then rotate the bottom rack to the top every 45 minutes or so. When I have done this, I put them in with the curve of the ribs up. I have always had puddles of juices lying in the ribs, just keeping them moist.
SNPP w/ mods, Patio Master(30 years old), Kettle Grill, Copper Penny UDS, and Maverick 73 thermo.
Youth and enthusiasm are easily overcome by old age and treachery.