RE: An observation..........
Actually you need to get your bow tuned--get your silencers placed and brace height where you want it--but you make a great point. Arrows that aren't the right spine won't only affect your accuracy, but more importantly a wobbly arrow will really impede penetration--not to mention an arrow with a wag might clip a twig on a tight shot and turn a double lung into a gut shot or miss.
Chad