Aldiko is one of my apps, but I've also got Mantano, Moon+, FBReader, CoolReader, and at least one other. Tried and liked elements of each, and use them for different purposes at different times. I've just managed to load too many dupes into them and, as you obviously know, it clogs up my SD card with extra files.
You are one serious gem, my dear!! Can't wait to try this out. Thanks for another great reading tool.