Hello CovertCapper, no problem, thank you for replying with your revisions.

I'm going to take a look at the main points I covered previously.

Altering silhouettes You cut into two out of four constructions. Here on this goat's belly. And some places on your kangaroo where you're hopping around between passes of your ellipses, which causes you to leave stray lines outside your silhouette and undermines the 3D illusion of your construction. This was something I already asked you to avoid, and highlighted on the head of your kitten and also on your rhino. If you don't understand what I mean by cutting into your silhouettes, or why I'm asking you not to do it, please do ask for clarification.

Leg constructionThis is better, you're sticking a bit closer to simple sausage forms most of the time. Remember that each leg section should be a complete sausage form. In this anteater it looks like the top section was extended off the shoulder mass as a partial shape, instead of being drawn as a complete form and then defining the intersection with the shoulder mass. Try to keep your leg sausages roughly the same width at both ends. The sausage for the upper arm of this koala is fairly uneven, it would probably have been better to use a sausage of more even width, then capture that tapering with an additional form. Sometimes you drew around your sausage form twice, like the front leg of this goat remember you only need to go around twice if you're drawing ellipses, not for sausage forms.

Head construction This is a lot better, great work! You're wedging the pieces of your head construction together and the feel much more solid, well done. Just watch out for cases like your koala where you enclosed your whole head structure in a larger round-ish form. This has an ambiguous relationship with your existing forms, it would be better to break it into pieces, as shown in this diagram

Additional masses These are much much better as well. They feel more grounded on the underlying structure, and you've stopped piling extra contour curves onto them. Sometimes you try to do a little too much with a single mass. The mass over the neck and shoulders of your goat has quite a complicated silhouette with two outward bumps and one inward curve where there is nothing there to press against it. It would probably have been better to have used multiple masses to achieve the desired complexity there. For the mass over the goat's bum, it looks like you tried to incorporate the tail into the mass, and it's falling a little flat. Try to do things step by step, so that your construction feels 3D.

The last thing I want to talk about is the torso sausage on your kangaroo. If you refer back to the lesson overview it explains that the rib cage should occupy roughly half the torso sausage and that the torso sausage should sag. You're quite a long way off these properties in your kangaroo construction, and while I do get where you're coming from, with the forms you can see in the reference, but it is still possible to follow the instructions. I've done a quick demonstration here of how we can play with additional masses to build up the kangaroo’s hump and booty. Just because the instructions don't seem like the easiest way to build your construction, does not mean they should be discarded.

Okay I think that about wraps this up. You've made significant progress with your heads and additional masses, and I'll leave you to keep working on applying this feedback on your own. If I've said anything unclear or confusing, feel free to ask questions. I'll go ahead and mark this as complete. The 250 cylinder challenge is next, best of luck.