Joemomma, methinks you will have a rude awakening when you make the nutrient additions. You very well may experience a nice volcano when a portion of your mead must suddenly might want to exit the container when the nutrients hit the solution. You called it a blowout and you are thinking well my friend. Glad you anticipated it beforehand. You may want to get a bit resourceful with a clean and sanitized jar and pour off some of your must (maybe a pint), slowly add the nutrients, watch the activity and once it calms down after a few minutes, slowly add back the pint. Next batch you may want to use a larger primary container to better accommodate the activity of the yeast once they see a nutrient addition. But you are studying well my friend and you are thinking on the right wavelength. Let us know if your precautions during nutrient additions have saved you from losing some of your precious BOMM.