The best a day and a half the block has a cone augmentation 38 toward one side thereof and a cone break on the far edge thereof. The cone augmentation 38 has a level upper surface 42 and the cone break 40 has a level lower surface 44. The cone augmentation 38 is situated similar separation from its particular finish of block 10 as cone break 40 is situated from its individual finish of block 10. Side 12 of block 10 reaches out over the best a day and a half structure a shoulder 46 expanding thereabove. Nonetheless, side 14 doesn't reach out to a similar level as top a day and a half, shaping a break 48 that has roughly similar measurements as shoulder 46.