A couple of points I would like to clarify:
(1) Just to clarify, my concept of quality control is that manufacturer check to be sure that the functions of the power equipment they sell are operating correctly before they release the product for shipment. For example, for a new 14" bandsaw I bought (115" blade) for over $1400 with a well known brandname from a well-know retail woodworking store, (a) the blade tension lever would now work (had to take it apart and reassemble; I checked their floor model which also had the same problem), (b) the power worked for a while then would not start - called the mfr and we determined it was the brake foot pedal cutoff switch had not been installed properly - I adjusted it and it started fine (the well know retail seller - a woodworking specialty shop - did not even know it had a cutoff switch), (c) a rip fence that was not vertically square and was off by 1/8" (the very small allen screws that adjusted this were hardly visible and the bandsaw manual did not identify that these adjustment screws even existed in this model; I checked the floor model at the retail woodworking retail specialty store and it had the same problem). These are some of the problems that in my opinion would not have occurred if the mfr (at the overseas source or at the mfr itself) did any quality control at all.
(2) Consistently, for several of the power tools I have bought recently (am outfitting a new shop; 220v 8" jointer, floor standing drill press, table saw (a very safe good one), large floor standing lathe, floor standing bandsaw, disc sander, router table/lift/fence, planer, high quality dust collection system, etc) (this isn't Home Depot stuff), the owner's manuals that come with the model of equipment have not been updated and do not include provisions/descriptions of all of the functions of the equipment. The mfr has chosen not to update the manual for the new model, and sometimes the owners manual are for older models and do not cite the new model at all since it would cost them to do so.
I grew up in Oregon (not there now) and started work in lumber mills at an early age and have been building what I consider high quality hardwood furniture for well over 45 years since I was 16, so though I am not a professional in that I do not sell my work, I consider myself fairly experienced. For my new shop, I have been disappointed in the quality control for some but not all the new equipment I have recently purchased.