There are two versions for this pack that you may choose from to give your sentry blocks a more consistent visual style, those being the dispenser, dropper and observer. This pack also adds directional indicators for all these blocks for either version.
The dispenser style alter the observer to be more reminiscent of dispensers and droppers, including a different textures for front and back sides depending on its orientation.
The observer style alters dispensers and droppers to be more consistent with the observer, including the directional indicators being present in only two sides of the block even when rotated vertically.
The versions are listed "CS_Dispenser_Style" and "CS_Observer_Style" respectively.