The Drawer Controller's top and bottom texture appear quite crude and blurry, most likely due to having been edited from the Blast Furnace side texture. I would suggest simply using the Blast Furnace's top and bottom texture for the Drawer Controller's top and bottom texture, as it seems to look like what you are going for.

We consider ourselves adept at spriting in the Minecraft style, so, if you're looking for a more unique appearance for the Drawer Controller, and have a general idea of what you want, we could hear you out and attempt to create something.~