Mekanism factories are making my neat-freakiness twitch.
My ACME machine wall has the Mek ore processing system (up to 4x) along the bottom row, then my TE, enderIO and railcraft machines on the rows above it, grouped nice and tidily.
Then I realised I needed an osmium processor thingy and I didn't have space the other side of the smelter because that's where my ME network starts, so I had to find space for it on the row above and it just looks untidy having another factory that isn't in line with the others.
*fictional world problems*