I just built the Crystal Crawler, an official Power Miners combination of the Crystal Sweeper and Claw Digger! It is definitely the best combo set from the first wave of Power Miners,
1x LEGO Building Instruction Booklet 1 Power Miners Crystal Kristallsammler 8961 | eBay
LEGO Power Miners: Crystal Sweeper (8961) for sale online | eBay
Another Rock Raiders/Power Miners re-imagining: set 8961 Crystal Sweeper! : r/lego
LEGO - Power Miners - Crystal Sweeper #8961 for Sale in Winter Park, FL - OfferUp
Amazon.com: LEGO Power Miners Stone Chopper (8956) : Toys & Games
Crystal-Sweeper-Proto | The second prototype loop of the Pow… | Flickr