I want to put up a shelf of either MDF or Pine in my kitchen (approx W220cm x D30cm x Thickness 2cm). I'm aiming to put up 3 brackets made from 3 vertical plates (3" x 3/4" timber) with fairly solid triangular shelf supports (approx 1" thick) attached. My question is how do I create the brackets, i.e. how do I attach the triangle supports to the wall plate and when? Can I assemble these first by screwing through the wall plate into the triangle or what? Sorry if this seems a dumb question but i'm stuck.