Clear/Erase Set Button, Display Cards In Set

Have you considered a set list reset button for users only? I tend to input as I go along and I don't always add extra cards. If i wanted to go back through and build a single set and discard the rest i would have to un check every card i had already inputted. It would be just per set, like 1990 Topps Gold Football and you could even customize it like "clear base" or "clear parallels" or "clear all". Secondly the sub menu for adding cards is kind of annoying. Have you ever considered adding a + / - button with a number counter on the main set page? That could save you some server space as people/server would not have to load and reload a page to add additional cards.