We installed 6 100*100 stirrups in concrete after someone suggested them in Bunnings when we said pergola. Now we came to purchase the posts and realized 100*100 cypress or pine posts are not smooth and do not have proper shape. We found 90*90 posts in premium section but nothing 100*100. Wondering if we can attach 10mm wood to 90*90 posts and make it work with stirrups that can't be changed. Or any other way to make it work.
Our pergola is just for grapevines and roof will be just covered in strings to spread the vine. No actual heavy weight on it.
Any suggestions will be appreciated.