Sloths Draw

I did the third exercise from the last prompts, and picked five complex objects, first drawing them from memory, then looking at references and drawing them again. I chose to draw a beach chair, an electric drill, a turntable, a microscope, and a hole puncher. I c&p'ed all sketches into one image for easier posting, the first attempts on the left, the ones after looking at references on the right.

( cut for sketches of objects, all worksafe and harmless )

Again, concrit is very welcome.