I'm at the chop saw cutting all of my 1x3's and my wife asks if I want to do the compression fit or have backs on these frames.
We cut the sides exactly 48" and then the ends 1/4 shy of what they needed to be (butt joint), layed the panels inside and then just squeezed them together and nail gunned them. They stayed with no backs at all.
And...the obvious part... after one horrible attempt doing it upright, we discovered it was WAAAAAAY easier to just nail it all together while it lies down on the flat concrete driveway.
We cut the sides exactly 48" and then the ends 1/4 shy of what they needed to be (butt joint), layed the panels inside and then just squeezed them together and nail gunned them. They stayed with no backs at all.
And...the obvious part... after one horrible attempt doing it upright, we discovered it was WAAAAAAY easier to just nail it all together while it lies down on the flat concrete driveway.