That's the thing, again read. I don't have to tighten them every time. I never had to. Are you just brushing off my comments as an isolated case cause it doesn't support the argument, and discard the fact that it is possible, not only by me (through repeated numbers) but by others as well? Would the fact that Yamato never made a change to the transformation mechanism cause there was nothing wrong with it in the first place and served to securely hold the neck together in fighter mode? Are you also discounting the fact that ALL toys get looser with repeated movement, and really try to nail it on this toy simply cause its made by Yamato?
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With the battery issue, it doesn't matter if they have a insulator, the battery isn't fresh, and in temperate climates like China, which most often is above 16 degrees celcius, batteries will experience a trickle discharge and lose some power over time. With the transportation and storage that a battery goes through in a toy from overseas, I'd rather get a set from a high turnover store locally than wind up with half spent batteries.