Yeah, I'd say that coordination/technique is at least as important as strength, because it's already become a lot easier after the fourth or fifth short training session and there's no way my grip strength has noticeably changed in that period. In the beginning one kinda wastes a lot of physical and mental energy on flailing and not stabbing the holes right on the first attempt. But once you get the hang of putting the pegs into the holes cleanly, it suddenly feels a lot more comfortable.