AAENGINE recently tested the landing leg system of reusable sounding rocket AX-1S, which is based on the 2nd stage of AX-1 (more info in quoted tweet).
AAENGINE recently completed the first testing at their newly built stand rated for 10tf kerolox engines. The engine in this test, AY-1A, will be used to power the AX-1S vertical landing test vehicle