CNCmakers 4 Position Lathe Electric Turret

Does anyone have experience interfacing linuxcnc with one of these turrets made by CNCmakers?

They look interesting, but I'm not sure how they work. I mean, what is the required procedure to change from one tool to another.

cncmakers.com/cnc/controllers/Tool_Post_...tion_Tool_Posts.html

In this page there is a .rar file with lots of details. It is supposed to be the changing tool procedure itself. But I still could not wrap my head around.
cncmakers.com/uploads/soft/manuals/LD4(H...enance_CNCmakers.rar

What do you think guys? Has anyone ever tried this seller? I'm planning of purchasing one of them for my lathe. I just need to figure out what is the required procedure so I can implement some classic ladder logic.

I tried to reach them via whatspp, Still waiting for chinese hollyday to finish. I'll be posting news here.

Thanks!

Bruno