
The holes look home made and a vintage diamond tom mount does not fit. There is a small split jutting out from one of the drilled holes to the drilled holes. It is covered by the mount. There is also a split from one of the drilled holes that can be seen even when the mount is on.
However, does not go all the way through the shell. Even with this mod it is a real looker and player and a tequila sunrise 20x14 is rarer than hens teeth.
The heads on it working but are fairly old and I always recommend a new set of your choosing based on your playing style.