I use 380g of Arborio rice when making risotto and it very rarely spits or causes the MC to flip over. Leaking hot liquid in my experience is a sign that the seal may need to be released. Perhaps I misinterpreted your original scenario but if you've had your TMX three years and used it regularly I would check with your consultant about replacing the lid seal as a matter of course anyway. Do go back and read your TMX manual about this issue. It is very often helpful in situations where troubleshooting is required.