After two crash (one motor stop and my quad flip) i decided to try these motors at the ground for find where is the problem.
This test show the sync issue with this motors and SimonK reflashed ESC but only with 4s LiPo, with 3s there's no issue.
Same sync problem with other common ESC with stock firmware, so it is not a problem related to SimonK firmware with this pancake motors.
In the "Smartdones" english site there's no detailed specs declared for this motors (only KV), only in the german section there's an image with with their test, so special thanks to the "Smartdrones Team", i destroy my SD-R600 quad and four expensive propellers (over 300€ of items) for their "distractions"... DAMN! :-)
I send a lot of mail to Smartdrones for this problem and others, no reply, missing
people... bah!
