We donated ours to a friend since we decided to bite the bullet and order a Diamond polisher. The DIY last over a year and was still going strong after using it 2 times per week consistently.
We got the Diamond so it wouldn't be an eye sore, also we like the timer feature (you can add this to a diy project as well) and its relatively quiet.
I just about pulled the trigger on a new Diamond ball polisher myself yesterday just to buy myself some time and talked myself out of it. I'm just going to rebuild mine and try and make it better. Just need to find the time to do so. I'm just sliding the carpet in at the moment when I polish the balls. lol
I use to set a timer on my phone when I would start the polisher. After sometime I figured out when it was done without a timer. When you first start the polisher with whatever polish or cleaner your using, take notice how the balls react when the polish is spent. The balls will spin faster at first when the balls have some polish on them, then the balls will slow down a little and the sound changes also. You just know when they're done.
If you accidentally use more polish than normal, it will just take longer with the same effects.
Getting a solid color bucket with no markings with matching lid that matches your room helps making it less noticeable. Some thought mine was a trash can at first. lol