Phiro and Ed, thanks a lot for the so valuable information! Really, the issue of the detail amount on a model that will go for printing is a very important issue. I do not have any experience yet on those matters, I have to do my first tries in printing -I do not have any printer, just thinking to order some on the available web stores- and see what is going on. One reason that I do avoid making too detailed designs is exactly this: not being sure of what the existing, nowadays, printers are capable of.

Below another try, this time even more simple in its design. It is very slightly 'touched' by the deformation cage in Rhino, but other than this everything has been done in Moi: