Not really a matter of who knows more, just what's been tried and true. Just about anything that can go wrong or rite has happened, folks on forums from all over the globe are bound to have had experiences with the good and bad in just about everything. Listening to advice and then deciding what's fact is the part that's hard for some folks to decipher. A logical approach is to follow the direction of many stating the same thing. What I know about anodizing is because I have 15 years exp doing it. I build RC parts, Flashlights motorcycle and gun parts and electrical devices from metals I anodize. The proper way to make a threaded anodized part is to size the part for the threads including the layer of oxide in the measurements cut the part anodize and then rechase the threads to clean off the oxide layer. This isn't the fast way to do it though so many do not do it that way its easier and faster to cut the part and throw it in the anodize tank and let the customer deal with any issues with the thread connections. China is a huge offender though not all, I have gotten some very good quality flashlight housings from there. just depends what and who.
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