Your cage looks very nice and well built. But I have one critique that is not directed towards you because it's not easily changed, but for those designing theirs in the future, I'll share my comment.
It mainly concerns the two lower main hoop braces. They "look" perfectly fine and normal as installed, but unless there is some structure unseen in the DS tunnel that ties the lower ends of the braces to each other, it's not a solution I would suggest. IMO it would have been better to connect both lower ends together on top of the DS tunnel with a single formed 6"(?) sq mounting plate, ie a single node point. Every solution has a downside, and the only one I see with this suggestion is a shallower angle for the braces, which IMO would not outweigh the stiffness gained from this change.