Don't the Arrows have extention leaves like Koala and Horn? On the smaller models, the extension rests on the door.
I found a plastic storage chest and put it under the extenstion. I don't use the lock for the door. I didn't like the weight of the extension sitting on just the door edge. You can put a storage chest behind the door. It keeps it open.
I ran out of room and had to take doors off to fit tables.