Well, as the title suggests, I've now used one blade of every type contained in the sampler I ordered at the same time as my EJ DE89l. Derby, Bluebird, a couple types of 7 O'Clocks, a couple different SuperMax blades, several Treets, a Feather, and one or two others. Some great, some good, some meh... Back to a fresh Derby today. It did a great job. It will be interesting to compare all the blades again now that my technique has surely improved during the first time through. Cheers!