4 Layered Red Velvet Cake

I recently made a 4 layered cake, it was a red velvet cake. I made 2 small round cakes and cut them in the middle so all together there was four layers. Then I layered them up one by one and put a layer of buttercream in the middle. I put a crumb coat on the cake and stuck it in the freezer. After awhile I took it out and iced the cake in a simple buttercream. Once the buttercream