I sail a Blade uni with a '08 Glaser main and have had some difficulty keeping the boat from popping up once the wind builds. While other guys are able to harness the higher winds and I am struggling to keep the boat down. I am not a light weight guy, so I think I have balast covered.

Here is what I have tried so far - sheeting harder, downhaul, and trying to put more tension on the diamonds (up to the max in the Falcon tuning guide). I have also set my spreader rake to the settings in the tuning guide.

Am I missing something basic here?