Great job on your Deltoids, Legacy!
I have a great idea for a criticism. I love how much range of expression you've got on your deltoid muscles, but I'm not getting enough range of cartooning and caricature of your observations on the deltoid studies. Would you please kindly free up and express yourself even far more, with 60 minutes of 29 second drawings of quick muscles? (3600 seconds/29=124 deltoid scribbles)
The reasons why:
1) To help your muscles less stiffer and undertured, and more caricatured and exaggerated and cartoony.
2) To aid and abet (if you pardon my language) to make your muslces less rigid, and more animated, vital, and energetic.
Here are some influential images:
Jack Kirby (Pre-marvel Period)
Link to more muscles here (click above)
So, good luck to you.