An even cheaper option would be to purchase this cage with the Ratio pulleys. In stead of going with SRAM XX SL pulleys. (You have the option to purchase the cage with or without pulleys.)
Ratio claims it’s stiffer than the SRAM as well, which makes sense because the Ratio uses 4 bolts to connect the inner and out cage, whereas the SRAM only uses 2 bolts.
I got a 2-1/2hr ride in with it today, the transmission was shifting so much better….but to be fair the old SRAM cage was bent out of spec. My new Ratio now has some scratches on the bottom so it made contact with rocks at some point. It seemed to deflect off rocks better. When the SRAM cage made contact it was noticeable because it would drag and snag, and I would hear the transmission shifting back into the correct position after getting pushed inward by the cage strike.
View attachment 141398