These structures are always hard. my 118 was so different then my 120.
After returning, the 116 makes sense I just had to use a certain concept to the extreme.
Took me a long time. Was getting 120 with almost every setup but finally found an area where I could do a pipe and got 118 next try.
EDIT: The 116 is really clean. I found a few different 118 variations and was able to combine them to get the last 2.
