Smuvers Farm
Melvin Up the Taterhole
Thanks! I order those 90 degree 3 way corners from Amazon. You can't get them at the hard ware store. I'm also considering revamping the top so it has a slope so water doesn't puddle in the tarp.
(https://www.amazon.com/FORMUFIT-F0343WE-WH-8-3-Way-Fitting-Furniture/dp/B00MNIYYQS/ref=sr_1_1?s=industrial&ie=UTF8&qid=1507844668&sr=1-1&keywords=FORMUFIT+F0343WE-WH-8+3-Way+Elbow+PVC+Fitting,+Furniture+Grade,+3/4"+Size,+White+(Pack+of+8))
We've made pretty much the same run as you and bought the joiners from Lowes.