Was thinking about how much I like my stove and had some questions. When I look in my stove, I see that I have 3 notches for a side burn plate to hang. The ones currently in my stove only take up two spaces. I hear that one is considered NON-UL (2 hole plates) and the other UL (3 hole plates). Being a newbie still, I wonder, what is the purpose of these plates? To protect the stove? Should I buy 3-hole burn plates? I want this stove to last a really long time and I want to take care of it as well as possible, so do these plates help that? Also, if I purchase 3-hole burn plates, does that do something to change how the heat is pushed out of the stove? Will more of it come out of the top of the stove, will more go out the chimney...etc? Thanks for any insight! Attached a pic of the burn plates on the sides with the top plate out. This was before I hooked it up this year.