I found many threads on this topic, but i'm tired of reading...... 
Don't have the stove as of yet....but thinking ahead of the game, maybe building the pad is easier than buying a stove.
I like "corner install" pads, to me they look more elegant and better finish, see the picture.
I think i want a 42x42. What is the material underneath of this one in the pic surrounding it, is it sheet metal and if so how thick it is and can that be bought with my specs? For example, if i want the pad 42x42 but a cut in front to make it look nice for a corner.

Don't have the stove as of yet....but thinking ahead of the game, maybe building the pad is easier than buying a stove.
I like "corner install" pads, to me they look more elegant and better finish, see the picture.
I think i want a 42x42. What is the material underneath of this one in the pic surrounding it, is it sheet metal and if so how thick it is and can that be bought with my specs? For example, if i want the pad 42x42 but a cut in front to make it look nice for a corner.