The tips aren't currently for sale separately but we're working on adding them to the website, we should have them (and some other little bits and pieces) added within a week.
The tips and silicone bit should work fine with the older GonGs (but not the old old WPBs). Performance wise adding a stainless tip greatly reduces the bowl size and restricts airflow quite a bit, it also moves the bowl as close as is possible to the heat source so makes for very aggressive heating.
The tips and silicone bit should work fine with the older GonGs (but not the old old WPBs). Performance wise adding a stainless tip greatly reduces the bowl size and restricts airflow quite a bit, it also moves the bowl as close as is possible to the heat source so makes for very aggressive heating.