The kit was sold by Amazon themselves and as you can guess it makes absolutely no sense to contact their support about this. ;) That's why I went here. I don't mind coding and I have lots and lots of programmable robots that are not toys, but this is my first quadruped. I lack the time to assemble one, so I was happy to find a preassembled version, I would not have bought an unassembled kit, for that I have too much other projects lying around. It would have been really helpful to have clear information in the box that Bittle needs a calibration and maybe a new firmware. A small paper slip would have been enough.

I did not get that text shown on Amazon Germany, but it was a similar one. However, from what I can see the right hind leg is not correctly calibrated and has a wrong angle in EQ mode. I'll connect it to a computer, upload a new OpenCat from Github and try to recalibrate. Thanks so far.

Thanks. I am referring to exactly this manual, here on this website. As I wrote in the opening post: I bought a preassembled Bittle on Amazon. I was expecting that a preassembled unit comes calibrated. And from the way the documentation is setup I was definitely not expecting information about a preassembled Bittle there, as I was under the impression that the information in the shown location is or kits. As I said: the way the manual is set up is confusing as it mixes different topics and releases.

That answer does not make sense to me. If there is an imperfect limb alignment, wouldn't it be better to align the limb? Just running faster ist not a solution, it is not even a workaround. How can I align the limb? I will try to install a new OpenCat version from Github, but I cannot see how that can solve a hardware problem? If you refer to the manual it would be good to provide a direct link to the relevant section. I have already read through portions of the manual, but in parts it looks like a bad Google translate and is difficult to comprehend. I have worked with arduinos a lot of times in the past, So basically I know what to do, but the manual is ... complicated to say it friendly.

No answer via email, no answer here. I fear I will have to send Bittle back. A pity.

Customs officials in germany tend to be a pain in the ... you know where. The way non-EU shipments are handled differ vastly on the local customs office in the city and how bored the customs officer just is. Generally it helps a lot if 1) the german carrier is DHL and 2) thare is a correct and complete invoice on the outside of the package. But even when those aspects are met, because customs officials seem to be only glad when they can pester citizens baseless, there may be problems. It depens on where you live, some cities are better than others.