Ha! Just scored a twenty drawer flat file... Free to.
I am in engineering and we are all still going digital. You should have seen the room I pulled them out of. Thousands of old rolled up plan sets and the like. They were going to scrap them but luckily the owner knew I collected posters... Lucky. I would like to just get one flat file. Very cool though Charlie. Free is always great. Just means more money can go towards posters