With the original nutribullet and the 900, preparation charts would always say to peel the skin of an avocado and not put it in the blast. It could damage the motor. Yet in the infomercials for the Rx, which clearly has a more powerful motor, they don't take the skin off (but obviously you still need to remove the pit). The infomercial also puts an entire apple in the Rx. This was done on the HSN network, so I don't know if that information is correct.
In short, are the preparation guidelines different for some foods for the Rx because of 1700 hp motor (vs 900 hp and 600 hp on the other two)? Are there some foos where you can leave the skin on (often the skin has some of the most important nutrients), leave the seeds in, etc. If so, which ones? Also, which ones are the same as with the original model and the 900 model?