This time around I realized that if I just screw two 2x4s together, it will perfectly locate the long 2x4 for me. This shelf went much faster, despite being more awkward to handle.
Not quite finished as I ran into another slight design issue. Unlike the garage door opener, I'll be cutting the power to relocate this one. Is this a 3-phase that I can hook a welder up to?
This was under $4 at Home Depot! Not even worth it apparently. Who sells the BEST phillips head bits? I'm tired of breaking them already. Pretty much everything I've purchased branded as HDX (Home Depot cheapo brand) sucks balls.
Seriously, thank you everyone that helped me out with this. Special thanks to T-Giv for all the wood, of which I still have quite a bit.