Something I would like to see in this mod: Block Breakers and Block Placers.
I was thinking that there could be three tiers of them: A simple, low-tech one, that simply places/breaks one block in front of it when it receives a redstone pulse. And that's about it.
Tier two would require power, and would come with both a range boost of 8 blocks in a line in front of them, as well as adding different redstone options. (Always on/Ignore redstone, Only on with redstone, Only on without redstone, redstone pulse) Additionally, upgrades can be added to increase range, but at the cost of more energy used per operation.
Tier three would require teleportation cores, and would expand its range to be a 3x3 area in front of the block breaker, extending 8 blocks from the front. This would allow for even more configuration, including block filtering and setting only specific areas that are within range to be placed/broken. Additionally, its range can be configured and moved (To an extent) to be nearly any rectanguglar shape by trading off axis. (For example, reducing the distance forward that it can go by 1 in exchange for 1 additional range downward) Also, this third tier would consume considerably more power then the tier 2 breaker, and can also have its range upgraded, with the same caveat of more power draw.