He used it the first time in the US Open Rodney Morris beat him in the finals.
I remember it vividly. I was at Best Billiards when that tourney was happening. The owner there told me Efren signed on with Meucci.
I saw the cue a week later when Efren used it at Danny K's. He lost to Parica in the finals of that tourney. He did run 5 racks with it there.
The week later, I saw Efren play at Hollywood Billiards. He used that same Moochi upstairs to play a man named Bruce some 3-cushion billiards.
I kid you not. That tapered down Moochi shaft was so whippy it looked like spaghetti sometimes. Yet, Efren used it to play some 3-C. Bruce was shooting with an elephant ear wrapped Gina. A drop dead gorgeous b'eye 3-c cue made by the master.
Weeks later, Efren used that cue in Hong Kong.