Holding up a 4x8 sheet of plywood with one hand while drilling and bolting that first hole was brutal until i got out a few cinderblocks to stack under the windows to hold the plywood.
The biggest lesson is that tapcon bolts are superninja hard and will eat cheap chinese shizzle sockets almost instantly.
Luckily, I had some snap-on and mac tools sockets.
Bring at least 5 of each socket size since some will fall to the ground never to be seen again.