Review on Flexible Synchronous Direction Connector by SATINIOR by Darnell Golden

We bought 2 packs of these motors and only one pack was opened and used. One of the engines has already failed, jumps or stalls at every turn. Very disappointing as we have used them on lathes and they have only been used once. Of course I hope that the others will hold up better. I tried to find a place to contact the seller but to no avail. Keep in mind that you may not get everything you paid for.