I bought a GC 3 "AK" and noticed that there were countersunk slatescrew holes down the middle (In the center of playing suface) Is this normal? I asume so slate seams won't shift. Have anyone seen this before? No big deal to fill and level with bees wax but i am worried about balls making dents in the wax during play (ex. bouncing CB on the break). Bondo would be imposible to remove. Is there a wax that is harder than bees wax?