Dot mod cap is 3.9, so this brings you at max dot damage of 162 pretty easy.
Also you can use the effect from invetory, just like tympan from GoD, just which there was 2 other drums with the other 2 dots hehe ;)
Looks pretty much like the picture, more detailed. Not a bad drum but when you are able to get this it's not really that super. With instrument AA and epic you close to most caps.
Still status-symbol :p