Nose with optional sonar: The nose now consists of three parts instead of two. Also it is possible to mount up to three US sensors (or other sonsors for sure). The part in middle can be printed without support. Left and right part will need support, but less than Robins parts. On middle part, the screw holes of US sensor are not complete. If you want to use US sensors, drill them through the part manually. I did it this way so you can use the new nose even if you don't want to use sonar here.
The attached file also contains some sonar lids for the left/right part. Print them, if you don't want to place US sensors here.

Node middle part
Nose middle part
Node side part
Nose side part
Sonar dummy
Sonar dummy