First, thanks for the mod!
The 1/4 foundations are actually 1/16 foundations which is okay I guess but I’d like to see actual 1/4 foundations if you can. Also, each 1/16th segment costs 6 concrete which is the same build cost as a full foundation! Concrete isn’t that hard to come by, but I thought that may not be what you actually intended.
Suggestion: The foundation with the center hole is amazing. Could we get versions with the hole at the edges/corners as well? Thanks for work so far, I look forward to more cool stuff.