We are finishing up designing a 4X6 coop. What size access door would you recommend. the height of the coop goes from 6.5 at the front to 5.5 in the back (this includes a 2ft base).I initially was planning on a 2.5'X2.5', would that be large enough or should I go to 3X3?, I want to run roost the length of the coop, but not have it attach to both side walls (due to the access door). Should I build a "stand" for the end that will not be attachedI also plan on having another 1-2 roosts above the long roost, going perpendicular. These will go front to back and can be attached to the walls. Can you have too many roosts? We are getting 6- 6 week old pullets (3 buff orps and 3 black australorps, just to give you an idea of how big they will be fully grown and how much roosting space I will need. Thanks!