I mentioned stairs, but that isn't the only way to get up and down in a shaft mine. To get back up, you can also craft and useladders. They are convenient as you only need a 1 by 1 square shaft to get back up. Another way to get back up is to first pour out a bucket ofw...
The nose had to blink and the 3D-printed one was an opaque white piece. I sanded it, glued a stick onto the back and then poured a mold of silicone around it. I used a clear resin with red tint mixed in and after it set I cut off the extra bit. I drilled a hole in the back...