Playing to its strengthsIn a climate in which decreased sales and profit are par for the course and have stopped being newsworthy, it comes as a welcome to hear that bucking the trend can, and is, happening, as Alan T Swaby learns. Cummins Power Systems is a Pennsylvania-based distributor of Cummins Engines, and its biggest customer is the truck industry. As such, it wouldnÔÇÖt normally surprise anyone to hear that it was having a bad time.