So, Export Cleaner is a modifier that you utilise, and you can't make it display on the preset buttons? Or am I misunderstanding this... in any event, about the weld vertices, the default is always 0.1, which often can end up being too high if you are working on a model that has a lot of vertices near each other. I always manually insert 0.01 whenever I need, though perhaps there is an option in the preferences of 3DS Max to set this to 0.01 on default