I agree with Pinwheel. What problem is encountered with fixed blades that mechanicals supposedly fix? It would be planing, which is caused primarily by a poorly tuned bow. Wind can have an effect, but in my experience, not a very big one in typical hunting ranges. In my opinion, an out of tune bow should not be using a mechanical. They depend on good flight to work effectively. If the bow is tuned correctly, then fixed blades will work great. The best mechanicals on the market may work okay with poor tuning, but they're still mechanical, which means they're more prone to failure because of the moving parts.