Read that they use solid fuel, for various reasons, one being that liquin fuels are very cold and satellites can actually spot it when you "fill them up" before launch. Solid propellant makes it fireable in under a minute. From a normal truck too.

They have also (but that was maybe the "9") put several satellites in orbit as a test.

Insane what they achieve.

Good article respectively blog post. Compact, no blah blah and almost no ads. Thank you for sharing.