Because the motors are operated simultaneously I realized that it is running slower than the others, that he has a stronger reduction and thus more power.
Someone has criticized the accompanying plastic hex wrench, I had no problems, it's still OK.
On my way, I have wood blinds to lower stop adjusted so that the blind tape is relaxed. Thus, there is no permanent force on the bearings in the closed state.
He gets the 5th star for 10 years, so far he runs, I think two months once a day up and down.
