This is the one. Here at the cajon drum shop we have been working on the rumba box for a couple of weeks now. The MkIII is looking and sounding real good. We are going to record it soon and then paint a tropical theme on it.
The box is 30cm deep 48cm tall and 60cm long.
The earlier rumba boxes were smaller and still good but the bass and volume of this one is much better.
We will post sound clips soon.