Sondors will build their 2nd prototype for performance and handling testing in 2018. It seems tweaking and pre-production vehicle builds would follow, parts sourcing, and tooling for production ramp, whether in the USA or China by 2019 seems unlikely for any new startup to get a vehicle to production in that short time frame to include SONDORs. Time will tell.
I will have put several thousand smiles on my FUV by that time.
I would think that manufacturing in China should shorten the production time, and once the production prototype is developed, should be rapid. Should have many thousands of miles on Model 3 by then.