Let us know if it happily handles a large rear sprocket over 28t
I always thought the body was the same short and long cage, just greater total capacity.
You can get it to do 8 speed cassette but you may need to file down one of the stops a bit - I've made a wheelset that does that.
So it will probably handle 9 or 10 as I think they're the same width (but I could be wrong).