I built these 8'-10' tall and didn't sand them. I plan on dropping them in 18'-25' fow. These turned out good I thought, I'm gonna fill some 2 liter bottles with spray foam and tie to top of the trees. I hope to built five more trees and 25-30 small brush pods out of all the short pieces for shallow water. I not sure about the nets. This is my first time going at this alone, I'll keep y'all posted on the outcome.