I have built several practice rigs over the years but here are two that will do wonders with distance control and maintaining dice together. Best part you don't need the Diamond Gator Skin. Don't get me wrong I do most of my time practicing on a normal craps table. But these aides might help you. All my rigs are placed on a standard folding card table. First Practice Rig: Very simple but makes you learn how to maintain dice control. 16" x16" 3/4 plywood covered with felt. Key NO SIDES just the board. Practice throwing from different distances keeping the dice on the felt. Very your arcs to see which once keep the dice on the felt. Second Practice Rig: Again NO SIDES. 16" x 16" 3/4 plywood with 3.5" diameter hole cut in the center and covered with felt. In the bottom corners of the board I use 1 in legs to keep it off the card table. Practice throwing the dice into the hole. This one will expose bad dice grips and distance control. No Dice Sets required just working on the swing and grip - the basic fundamentals. TIP: Pair up at least four sets of dice before throwing (more is better). That way you can concentrate on your mechanics and not chasing dice. The dimensions are just guides make them any size you want. Good luck! Practice, practice and more practice.