The quantum compressor is currently able to accept items into it's input slot even when the cap is full while in limited input mode. Changing this behavior so that items can not be pushed into the input slot during that time would make parallelizing the quantum compressor easier.

Current and mockup behaviors

Also, while not completely necessary, changing the compressor to only be able to accept items of the type already contained within the compressor would also be a nice change to aid with parallelizing.