Do EconoWave. Indignias are more "personal" in scale; they're not "Rock the house" speakers.
You don't have to cut into your L26s to try out E'Wave; just bring the woofer leads out the port, set them upside down, and put it on top. If you find you like the result, then decide if they might not warrant using another, perhaps different, woofer and cabinet instead, rather than sacrificing your L26s.... :yes: