Ohhh ok, I see now! Well, it'll be the best one to start with seeing as its a leaky one. You say you have five amalgams altogether....that is actually not "too" bad (though really even one is too much when you think about it).

But many have up to 8 or more. I hope that the one (or two) goes well for you so you'll be able to get the rest done with some confidence.