i didnt make it but its two mdf planks with supports along it to raise it up a bit and give it strength aswell as somewhere to mount it too. is just self tappered into the body does the job sweet as a nut.
Half a mo. The dog's going in a crate? How big is the crate? I'm thinking that some of the Seis had 2/1 split rear seats: if the pooch crate is small enough, you might be better getting the split seats rather than messing about with bits of wood.