It's not a matter of country, it's a matter of letting me use the scope as I want. In ten seconds of exposure the seestars tracks well. When I have dozens of images, I can recenter them later. Turns out it looks impossible to do, whereas it's quite simple for zwo to make an option of "no recentering". First it won't loose time between pictures, and mainly in this case, it will take pictures. The only picture I got was a screen copy of my iphone. I meant to make the equivalent of ten minutes of exposures. I can't. In the current software too, it seems impossible to make darks and flats frames, and this is also due to the way it's programmed. For newbies in astronomy, it is of course simpler like this, but for people who want good images, it's mandatory to be able to make series of images without recentering (if you make dark frames, it won't by definition, find any stars, and it's impossible to do in the current software). In fact it would be good if this could be done very soon, because that comet is going to get brighter, but by november it's gone.