Interesting explanation Stefano. I made no comment when this thread was opened because I could see advantages in this tender - but not for Ribsters.
For any sort of distance liveaboard sail-boat cruising an inflatable, as I have found to my cost, is a useless bit of kit. It is too fragile near coral or ragged concrete. And packing and unpacking is a constant pain.
One accepts the stowage difficulties of a rigid dinghy for its' robustness and ease of haul-aboard. Anyone who leaves a tender floating alongside at night in many parts of the world wakes to find it nicked by dawn!
On my 9m cabin RIB a rigid tender or your RID would be impossible to stow so I accept all the disadvantages of the inflatable - despite the fact that I hate the little b****r.
But for a 40+ft vessel with space to store the thing inverted on a foredeck somewhere I would give your RID serious consideration.
Good luck with it!