LeeChilders Thank you for putting up plans like this. I made a smaller one to better fit my space and minimize the plywood I would need to buy. I also re-enforced the side walls with angle iron and tied everything together so I could have a door that I didn't have to duck under something. It is also mounted on large casters so that I may be able to move it to a dark site if/when I automate everything. Because I can just roll off the roof and start imaging, I've had more imaging nights this month than I did all last year.