At least I am not allowing any bonus on any item uniques, 2h bonuses on 1h weapons yet, something you can do with hex-editing. It makes it faster than the mass-crafting and simpler than the hex-editing, but it is not doing anything that is not already being done today. I see no difference to hex-editing simple up to B24, file format still is supported too or the longer approach of mass-crafting s of items until the right one drops. Well than in this case this option is bad… as it is almost equal to a cheat because you can simply wish for and item and simply get it without any effort. If I get it right custom crafting is that you can make an item with prefix and affix that you chose to? Prepare for a mass of whining over that crafting feature though. It also reads the information from database.
GD Stash is written in Java and stores all items in a database, so it truly is unlimited.