Hard to say without seeing it in the flesh but I think the rails are too close to the walls for hanging larger deer. It's not clear from the image if you can hang carcasses on the front-to-back rails at either side, but I'd assume you can, which would allow you to slide larger deer to the back but they do look too close to the side walls to allow sufficient airflow around a decent fallow. The same with the side-to-side rails to tbh - they look too close to the front and back walls (and as you say, would be virtually impossible to load a fallow onto that back rail without doing yourself a mischief).
All hard to say without seeing some detailed plans / dimensions or looking at them in reality of course. Hopefully all good as do look like a decent alternative to Landig.
