The objective for me on the practice greens with the DryJect was to not only incorporate sand into the hole, but also Profile. Profile is a porous ceramic material which aids in water retention. I am hoping to see better water retention on these greens than we are use to.
I performed it this time of year to try and mimic March weather, but of course it had to be 65-80 degrees the first week of November. I would like to stress that while extremely beneficial for the greens, this is in no way a replacement for core cultivation. I see this being fit for a course that can only aerate twice a year, but needs to do it four times a year and can't. The disruption is minimal which may allow for summer time cultivation.