I thought the float needle problem was licked after the filing the burrs - it solved it on 2 i was having problems with.
Even reputable brand like ga spares - I have had seats pushed in at 25 degree angles. Was thinking of pulling the seat out completely and seeing what the viton tip does onto straight plastic.
The crap coming out of china now really is past a joke. Like the thermostat in the hot water system being stuffed out of the box. I would love to know their failure stats
but nothing beats a powertorque that starts first kick