I'm still in the process of getting one together. I have I think it's fir that doesn't seem to be as sensitive to moisture and other wood I've used. I took my table saw and cut strips and cut channels in the strip for the guide. The best thing I've found to use for the door is a fiberboard/plastic cutting board that is 12 X 18. It certainly is not bothered by wet and stays straight and is heavy enough to stay down and slick enough that I don't think any critter can get a hold to so as to lift it. I don't have a motor yet cause I have to use solar. I do not have electricity in the coop. I'll get a pic so what I'm saying can be understood. I don't have the money to just spend $220 for a door.