May I suggest making tube size (height, width) manipulable via a Focusmatrices? But keep the Distance slot so that it can be offset from the projector when using the dome upgrade.
May I suggest making large force-fields faster? For instance, when I do a Dome FF with 64 range expanders, I lag like nothing else. To me, it seems like you are checking the field's integrity every tick (or so). Now, I am not a mod developer (yet) but wouldn't it be faster and more efficient to use the block break event?