Looks good.....I would just round the board that applies the pressure and maybe pad it some.
Yeah, I've been considering that. There actually is a small bevel on the pressure applicator, but I might have to add more to it. I also have an old leather belt that I have already cannibalized for a different project that might do the trick.
When you add the cup holder, you will find you will also need a cup cover. Unless you like floaties in your drink. 
Ha, good point. You probably just saved me a beer.
Awesome. can i get the dimensions for this? I tried making one like Del's, but i can't work a hammer and nail to save my life. I think i can get the guy down the street to build me one of these.
The base is 16" wide, and 32 1/2" long. The tall leg is 29" tall on the long side, and each leg has a 15 degree angle cut on the top so that the 4x4 main beam sits at an angle. The main beam is also 29 inches long. I can't remember the length of the short leg but I'm sure you can figure out the trig given the angle and the length of the front leg and the main beam. The rotating arm rotates on a 5/16" piece of steel rod. The section of arm from the pivot point to the pressure point is 6", and the other section is a little over three times that long to give a good mechanical advantage. I just cut the braces to fit, and arranged them so that they wouldn't interfere with the rotating arm.
Those dimensions aren't exact but are pretty close. I never sat down and drew it out, I just kind of built it as I went along, and cut pieces to fit based on what I already had built. The fact that it turned out so well the first shot was more good luck than good management, but I'm not complaining. You might want to tweak them a bit to fit your preference as I built this custom to my body.
