not sure about that, you've done good i know it must have taken a lot of time patience and concentration managing all those pieces. i get alot of cramp in my hands and i am not sure i could do it thats for sure!
Just push yourself slowly adding a few more pieces each project. You will soon find yourself wanting to do more. Those pieces are small but I look at others that are doing twice as many as me. Tough acts to follow but fun to try.