Forge Multiblocks in 1.7.2 are not supported by buildcraft 6.16 with builder. Later on I will try it with 6.17 and 1.7.10 - but i still fightingl with updating my server :-) ...

Minecraft Forum: https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/2310397-additional-buildcraft-objects-a-plugin-for Download ...