I graduated to big blue today and feel fantastic. The only movement I couldn't do all the reps with the 20 was the presses and I did half of the eight reps on all three sets. The one armed rows were not easy either and as soon as I noticed myself start to twist a bit to move the weight instead of letting my arm and back do the work I switched down but I only had to do that at the end. Ah yes, I'm forgetting the one arm swings, I switched down for that too but that was just a guess-I didn't try the 20 on those and so I can't say I was unable.
It was hard. I mean, REALLY hard and my core was aching almost immediately-I love how not only do you have the forward motion but you catch and slow the momentum when the 'bell comes back down.
Time to go to the circus! Enjoy your weekends.