Yes, I was talking about CEM60 models. I talked to Dr. Jiang (iOptron's CEO) on NEAF about the RA&DEC locking tricks of CEM60, they put big warning signs & explanation in the box for that, and they're kind enough to cover it under warranty if user breaks the gears because of that.
I wouldn't take the warranty comment seriously. They state over and over in their documentation that worm damage due to user error is not covered.
That said after a while you get used to the mount and as long as you follow a set procedure the risk is minimal. Also, even when a worm is seriously scored (like when my IEQ45 Pro grease got too dirty) there's not always an impact to the PE.
Edited by gotak, 12 April 2019 - 09:32 AM.