Aerotech, for whatever reason, only offers 1 grain option for this RMS casing, the F35W White Lightning. That motor is very close in performance to the RMS F39W and 24/40 casing combo, but the F39 is less expensive per reload and uses the lighter, less expensive, and far more versatile 24/40 RMS casing. About the only advantage for the 24/60 is that Hobbylinc seems to always have them and their reloads in stock, the demand is so low. I wish Aerotech would release more propellant choices and more powerful grain/nozzle offerings for this stronger, longer 24mm casing. Unless and until they do, the 24/60 will remain a pretty limited-appeal motor, sadly.

You should purchase this if you're considering getting into mid-power rocketry. Consider it an initial investment in your mid-power rocketry experience. After the first three or four launches, the cost starts dropping dramatically per launch when compared with single use motors. I wouldn't recommend using this on just any 24mm rocket. If you're going to use it, make sure the rocket can take the thrust of the higher impulse. A good rule of thumb: if the rocket has a 24mm motor mount and balsa fins; don't use this product. Balsa fins will probably tear off unless you reinforce them. Consider that you will have to construct all your motors before launch. This will take a while, so either buy a bunch of these so you can make your motors at home and spend more time flying than building motors.

While it is true that there is only one reload option available for this motor casing, (F35-W), Aerotech is working on this as we speak and assures us that the certification of new reload kits for this motor is high priority. I also want to mention that the F-39, (29/40) is not actually a W propellant formulation but a T propellant called Blue Thunder. High thrust and very fast burn times compared to White Lightning. I would also like to mention that as far as I know, the closures for the 24/40 motor are not interchangeable with the 24/60 motor casing. It would be kinda nice to have the two motor cases and one set of closures to cut down on the overall cost for rocketeers just starting into the hobby