Ok you guys who use it I have read a few posts where guys have said there is deviation in thickness of the block and had to use 4 pallets to do a 2 pallet job etc. Is this still going on .....have a new dealer here and tempted to try it on a big job but dont want to get burnt. Obviously production screw ups can be regional. Also I guess you can use the blocks in a closed pattern or an open pattern? ie solid both sides or tapered one side.. tapered = cheaper ...curious what u guys do.