Heyy! I've been loving building stuff and this has been consistently on my mind. After you've aquired the 5x5 manipulator upgrade (or any other two size upgrades, really), you cannot go back to the previous sizes. This is fine and dandy when you're digging like a mole and looking for those ores and tunnelling like mad, but it proves to be a pain when you're trying to build delicate patterns and designs in small confined spaces. Switching between a 1x1 and 5x5 is a huge difference, especially when you need to remove many specific things from a mess of others. This gets emphasized when you do wiring and have to avoid touching things. It would be nice to be able to go back to the sizes 4x, 3x, 2x after getting the respective upgrades. It would be even more awesome to have the option to delete things in 1x5 or 5x1 lines for that matter. Those kinds of manipulator patterns would be excellent at handling long lines of tiles and blocks right in between the nooks and crannies of your magnificently messy constructions-in-progress! TL;DR - Please read. Thanks!