I make skate frames.
They are cut from solid 6061 (1.5"x3"x17"). The final result is 245g with walls that are 3mm thick. The design is special because it has a brake system built into the race skate frame.
The funny thing is a few years ago I had this as an idea and in a sense it was the idea that got me started with the CNC bug.
It's the first part I ever made and it was A LOT of work but it was also a lot of fun.