Thank you for your answers friends.
Mark, the choose to fish with 1 or 2 triple is actually a personal matter.
Curiously, when I was fishing with two triples, a large majority of GTs were made by the treble hook of tail, it's the reason I deleted the middle triple.
Sometimes I put a short assist hook at the head of my popper and 1 treble hook on tail.
On the French forum, I put a poll to find out how many fishermen fished with Barbless, unfortunately the majority of responses were, we fish with barbs
Again thank you for your answers, I get hot trying to speak in English