Dwaynes are recognised ( ...but doubt they are certified ) by Kodak for K-14 processing.
The results I've had ( and seen ) were terrible. 35mm slides with drying marks, dirt and in card mounts with rounded corners ! ....and 8mm with very 'strange' results ( albeit from out of date stock ).
Films sent to Kodak / Switzerland are forwarded to the US then returned ( via Switzerland ).
Kodak do not now include the processing price for cine film, but costs are included for 35mm slide films ( participating countries ).
Eastman Kodak DID make and sell 'small' K-14 processors and chemicals but didn't have much take up on this product ( as it's a VERY difficult process and required a lot of film throughput to keep in control ).
John S