Registering is easy but you have to go to airport to register. I went through the process but to be honest if you don’t desperately need item just give it up. Let customs take it -there’s no cost for that.
my wife went to Chiang Mai Monday morning and was in office10 minutes and new passport was in our mail on Wednesday. Easy to do and she received the 10 year passport which is great.
Leave everything in Canada and move with a suitcase. Everything is available at fair prices and the cost of shipping and customs is exorbitant. Enjoy the experience.