The magnet does replace the need for elastic bands. I only use ttch though. Cheyenne may not work as well, but since the magnet mod it's way easier to use carts. Literally just put your plunger bar on and put your carts in, no elastic bands, and your good. I'm sure by the way this one is designed with the stroke adjuster at the top and pushing force downwards, you could also use Cheyenne cartridges as well with no need for bands, because the magnet can be adjusted to counteract the pressure in the cart from the top.