I trust that I speak for the whole TF2Maps.net community when I say that Orange_x3 has been one of our biggest, nay, the biggest source of learning and inspiration.
Designing a balanced map, where the various skillsets of the different classes are accounted for in a way that makes everyone useful but puts no one at an unfair advantage is an incredibly difficult task. The elegance with which Orange achieves this - as evidenced by its unrivaled status as the go-to map for competitive Highlander and 6vs6 matches - has made it the object of careful study for any mapper with the least bit of ambition.
If there is one thing more impressive about the map than the finely tuned balance of the layout, though, I'd say it's the detailing. The esthetics of the map perfectly captures the essence of vanilla TF2's visual style, and the subtle use of texture changes, props, lighting and soundscapes does a brilliant job of giving players an intuitive understanding of the playing field.
I sincerely and wholeheartedly thank you for uploading this woefully underappreciated map, partly so that we may give it the praise and recognition that it deserves, and partly so that we may download it for ourselves and study the exquisite craftmanship behind it in detail.