When i try to pickup your combinators via robots i get this message:"Error while running event UsefulCombinators::on_robot_pre_mined (ID 15)
UsefulCombinators/control.lua:2217: attempt to index field 'buffer' (a nil value".
I play on the latest version but i use a lot of mods:
Actuator
Advanced Radar for Factorio 0.16
Aircraft
Angel's Addons-Ore Silos
Angel's Addons-Petrochem Train
Angel's Addons-Warehouses
Asphalt Roads
Atomic Robots Fix
Bio Industries
BiterBias
Blueprint Flipper and Turner
Bob's Enemies
Bottleneck
Bullet Trails
Cannon Turret
Color Coding
Colored Blueprint Books Redux
Dectorio
Deep core mining
Delete Empty Chunks
Double Furnace
Enhanced Map Colors
Epic Artillery Sounds
Factorio Logo
Factorio NEI
Flare Stack
Flow Control
Geothermal
Helicopters
InfiniTech
Inventory Sensor
LTN
Larger Inventory
Laser beam turrets
Loader Redux
Logistic Technology Beacon
Long Reach
Miniloader
Nixie Tubes
Party Stuff
Powe and Armor
Pushbutton
Raven
Ressource Rocket
Scattergun Turrets
Side Inserters
Single Splitter
Teleportation
Text to Speech
Truck
Useful Combinators
Vehicle Wagon
Warehousing Mod
Yuoki Industries-Railways

I know thats a sh1tload of Mods and i am absolutely no Expert, but
i love your combinators and i definetly wanna use them.
Great work so far.