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,
Power Miners site on LEGO.com updated | Brickset: LEGO set guide and database
Power Miners getting some love lately, but who has the instructions-only set Lego released? I think this was one of the best sets, with some interesting play features too. : r/lego