The items are grouped together so I would say that its not unreasonable to check that you have the main groups available before you start. You dont have to check it down to the last nut and bolt before you start ,i would say that you are more likely to loose something that way. As for complaining over a year after receiving the item, I'm inclined to go with Ultimaker on that one. As for the T's& C's that Daid has pointed out, they also say that they don't guarantee electronic components. Well if anyone does have issues with their electronics it would be worth pointing out to them that as a supplier, ultimaker have a responsibility to supply merchantable goods that should last a reasonable amount of time.The fact that it is a kit means nothing, you can buy a new video card for your PC that you are building in component form, the 12 month waranty still stands. In the UK a standard domestic waranty is 12 months, however , even with that , you can claim up to 6 years for larger items. so Ultimaker ,you may have T's & C's ,however I'm not sure that all of them are valid or even legal ,at least for the UK.
Paul