Issue Title

I made the Extruder Multiblock but the input bus requirement is too strict IMO leaving a very complicated set up to use this multiblock.

Suggested Behavior

I recommend making it so that the Input buses can be on the edge casings also, this would allow me to put all 9 input buses on the top of the multiblock for a tidier setup. Also I can put multiblocks next to each other.

I would say this rule would be nice to fix on the Wire Factory and Cutting Machine multiblocks too (and any 3x3x5 multiblocks)