The original goal of this mod was simply to add configuration options for making Create's contraption-making more complex and mechanically engaging. Since then, I've also added bits of original content to it, especially to support an upcoming modpack.

Configuration:

Blacklist Create contraption actors, preventing selected blocks from functioning on contraptions.
Configure if the Mechanical Saw can multibreak whole trees at once.
Overhaul the Drill and Saw actors to both function like a Drill, but with their own pickaxe+shovel/axe+hoe specialties for mine speed.
Configure the displayed recipe catalyst of Fan Processing categories in recipe viewers (i.e. changing the water/lava/fire/soul-fire to a different block)

Misc:

Ports automatic train (dis)assembly from Steam 'n' Rails, via a Deployer wrenching the Train Station block (disabled if installed alongside)
New recipe type: Precision Assembly; a Mechanical Arm will process the input item as it passes by on an adjacent targeted belt. Supports Sequenced Assembly. Can require an empty arm, or require a held item.
Lecterns on a contraption can be interacted with to place down a Linked Controller, or pick it back up

New Content:

New Linked Controller variants: a Linked Remote with one instantly-pressable button, a Linked Keypad with the number keys 1-9, and a Linked Macro Controller with 8 additional buttons.
Control Seat: when sitting in it, looking around will emit redstone signals in each direction, corresponding to the pitch and yaw.
Industrial Fan: an oversized variant of the Encased Fan, without the casing. Effects a 3x3 column of air.
Fluid Barrel: a variant of the Fluid Tank with an open top and the ability to manually bucket fluids in and out, but has reduced capacity and can't store gases or superheated liquids.
Gramophone: a variant of the Jukebox which requires rotational power, which can play music discs at different speeds.
Hinge Bearing: a variant of the Mechanical Bearing which doesn't take any rotation input, the player can interact with its contraption to manually push it open or pull it shut.
Handles: decorative complements to the Hinge Bearing, which play an appropriate door-opening sound when used to open one.
Glue Spreader: when powered by redstone, blocks in front of adjacent Glue Spreaders are glued together.
Encapsulator: when powered by redstone, connected blocks in front of the Encapsulator are stored into a placeable Capsule item.

New Generators:

Haunted Cogwheel: a small cogwheel that spins on its own, but randomly changes speed and will break if it isn't in sole control of its network.
Breeze Whirler: has the size and connectivity of a large cogwheel, spun by a captured Breeze.
Clockwork Motor: after time is spent winding it up with a Hand Crank or Wind-Up Key (or any other source), it will temporarily produce rotation while it spins back down.