Engineer's Toolbox 1.1.5.0/GasCraft 2.0.2.0 Update
The primary new feature of Engineer's Toolbox 1.1.5.0 is the auto mining system. It's based around an ancient Roman mining technique known as "hushing", although, the idea has been adapted to fit better with the mod. Essentially, it eats chunks by spraying water at them.
The "husher" module must be placed on the bottom of a socket, and then must be configured to use one of the internal tanks. You can then either put water or slickwater in the tank, but water is less effective. The husher will then begin to randomly destroy blocks below it within a 3x3 area, and replace them with blocks of whichever fluid you used. The blocks that were removed will then be output via a machine output installed somewhere on the socket. You can can configure the husher's range by installing a range selector module on the socket, and using the socket remote's generic (white) mode to change the range. The first (highest) setting will mine a 1x1 area, and the last one will mine a 19x19 area. You can also install a pressurizer module somewhere on the socket to improve its effectiveness, however, it will only function if it can get 240 MJ every 10 ticks. The effectiveness of the husher is as follows:
Water - No Pressurizer
Can mine blocks softer than stone
Water - Pressurizer
Can mine all blocks above y level 32
Slickwater - No Pressurizer
Can mine all blocks softer than obsidian
Slickwater - Pressurizer
Can mine all breakable blocks
The pressurizer module also increases the capacity of all internal tanks from 8000 mB to 32000 mB. It does not require power to do this.
The main focus of the GasCraft 2.0.2.0 update was to get rid of the reliance on having BuildCraft or Railcraft installed in order to use the mod for power generation. The update adds two new power generators, the gas generator, and the gas turbine. The gas generator is capable of burning hydrogen, natural gas, and BuildCraft fuel to produce power (the amount depends on the type of fuel). When burning natural gas or fuel, smoke will be output from the top of the socket the gas generator is installed on. You can place a chimney on top of the socket to collect the smoke, and then do with it as you see fit. The gas turbine produces a much smaller ammount of power from gas in its configured internal tank. You may want to consider using the smoke output from the gas generator to run a gas turbine.
The update also adds a refinery module, which can process any single ingredient BuildCraft refinery recipes.
Finally there's a new gas called corrosive gas which is produced by combining propellent and quicklime in the mixer. Corrosive gas deals large amounts of damage to mods entities however, if it comes into contact with villagers, zombies, or witches, it turns them into skeletons, but retains their current equipment. Zombie pigmen suffer a similar fate, however, there is a 25% chance they will turn into a wither skeleton rather than a normal one. If corrosive gas comes into contact with an enderman, it will instantly kill the enderman, and 100% of the time will drop 2 ender pearls.
Please make sure you have also updated Emasher Resource to version 1.2.1.4.
Mod developers should note that the API has been updated.