Harbor Freight just released this new, more expensive random-orbit polisher. It's part number 56367 and it has a longer throw than the older models, but it comes at a higher price. Here’s a tool test where I compare both dual action polishers side-by-side and tear them apart to see how they’re made.

Here’s a link to an Astro Pneumatic backing plate that many people use on the cheaper Bauer polishers. This is an Amazon affiliate link, so the channel will earn a commission from qualifying purchases: https://amzn.to/2MOBYZS