Space Ball One is a Estes PS2 Argent I picked up and flew for L1 cert on a AT H115 DM. This was a simple up and down flight on a CTI H118 classic. I lost the rocket for a week only 18 rows into a carrot patch. I did learn some things about the rocket hunter transmitter and receiver. I also found a rocket for a guy that lost it at a launch 2 months prior.