Hi. When you open creative mode inventory (and JEI list on the right too), you can see the following arrangement: wooden pipes, cobblestone, iron, diamond, gold (wooden – first, gold – last). Diamond is more expensive than gold (especially in Minecraft 1.10+), so I think more intuitive is that arrangement: wooden pipes, cobblestone, iron, gold, diamond (wooden – first, diamond – last). This should be also applied to extractors, because they are arranged in the same way.
Hi. When you open creative mode inventory (and JEI list on the right too), you can see the following arrangement: wooden pipes, cobblestone, iron, diamond, gold (wooden – first, gold – last). Diamond is more expensive than gold (especially in Minecraft 1.10+), so I think more intuitive is that arrangement: wooden pipes, cobblestone, iron, gold, diamond (wooden – first, diamond – last). This should be also applied to extractors, because they are arranged in the same way.