Hi Dylan - mate i'm impressed - just to give you a bit of background on these exercises - the reason they're so helpful is not only because you're practising the basics, but because there's only a handful of mistakes or improvements that people can make. They're basic exercises and airbrushing doesn't get any harder than this.
so to critique:
You're dots are perfect. These dots show us that you're double actioning correctly - always keeping the air down whilst airbrushing. that's exactly what we want to see.
Your lines are perfect. They demonstrate that you are moving before airbrushing your line and you're continuing to move after you finish your line. They also show correct double actioning. Your bottom line shows a blob on the left hand side and these are what we look for - it shows that you weren't moving but instead started airbrushing first - bad practise. This line is the only one not perfect and i can see you were moving through your other lines as they are all perfect lines.
Your blends are impressive. These are very difficult to master as i'm sure you're finding out but either you have a good camera or you're doing the blends really well. Obviously the first 2 blends looked a little streaky, this just comes from lifting up to fast and not blending it enough, but i don't see those same streaks in the rest of your blends.
From what i can see you're doing all of the actions correctly - the only thing i'd like to see is you practise more of what you're doing and aim to get lighter and lighter results.
The lighter you can do these effects - the better your control.
thanks for posting them up mate this is going to help alot of people