Today I tested Chinese large DISA ordered from eBay. Overall quality is normal, one thing I noticed flap plastic is not as hard as on the original one, I tried to bend it with my fingers and it bent, actually don't know if that elasticity will cause something in a working process. Rubber harder on the Chinese one.
And finally, I can't understand how they can be as stupid as to do it incorrectly. Tested with INPA, closed and opened it several times, noticed when I initiated open action in INPA flap closes and when I initiated close flap opens
(( they connected motor connectors in opposite directions.