When I began building the furniture behind the engine box, I didn't take into account the fact that the hinges on the box cover made it move backwards when it was opened. This meant that after the cover was opened several times, the hinges bent in the wrong place and eventually broke. It was too late to even think about changing the furniture so I had to come up with another way of hinging the cover.
The answer was these rubber engine cover catches which I found at Repco for $12.00 each. The box opens and hinges OK, but isn't ideal because the box wants to move backwards when its propped up, but I have a plan to fix it by putting an aluminium plate behind the cover so that it rests against it when open.