I had to replace a large window on the upper level of our house and was too impatient to wait for help.
I used Creo to design the pulleys. They each use a pair of skateboard wheel bearings that I had on hand. I used scraps of steel that I had laying around for the rest of them.
It worked perfectly to lower the old window and lift the new one into place. I tied the ropes to an ATV to do the lifting. Note- I wouldn't have bolted the supports to the side of the house if we weren't replacing the siding soon.
Not very creative, but an example of a useful printed item.