Good news - bad news.

These fans are not GWS units. It looks more like a copy.

Bad news: I made a special tool to pull the fan out. It was sitting very tight. I used 25mm M2 screws that I screwed into the shaft and hard bent hard steel wire with hooks at the end that grabbed the fan be the hub. Thys way puling by the wire against the M2 screw at the center Slowly I was able to take out the fan out of the metal "shaft adapter". So far it is like GWS. Now the shaft adapter does nothave a set screw. It is press fit on the motor. No way to take it out. Even heated with torch did not want to let go. It is not necessery to remove the adapter before removing the motor. There is no center part in the fan unit like GWS has. So now I have plastic fan rotor, but I don't have adapter. I'm going to make them myslef on my mini lathe if I will not be able to buy new GWS rotor or adapter.

Good news: brushed motors installeed in A-10 are 24.20mm diameter. And, surprise, the fan unit can take my BL motors without turning them down. They will slide down easy.