I've had to ship heavier stuff across Europe a couple times, and honestly, finding the right courier can be a pain. What really matters to me is not having surprise paperwork or standing in lines, especially for something that's 14kg. I usually look for options where I can sort the label at home and just drop it off locally, nothing fancy. Also, insurance is a must because parcels can go missing or get delayed for ages.
If you ever need to ship things from Europe to Russia or other CIS countries, there are services that let you handle everything online and include free insurance. I came a