Well the Croatian fella doesn't have a direct link to a website or anything, and so far he hasn't responded to my emails so I reckon he's not doing these kits anymore. Here's the video anyhow: https://www.youtube.com/watch?v=ZrYjQat4KGE

As for the Evo-Hydraulics kit, this is the one: https://www.evolution-hydraulics.com...ir-service-kit I asked them whether it would work specifically on Legnum AYCs, and they confirmed.