I had a boat that was cracking at the front cross bar and at the side stays. I drilled the ends of the crack and used "GFlex" to fill the cracks; look for my post on this forum.
For the side stay I made custom plates that were longer than the factory plates and ran a bolt through the hull and placed a nut and large fender washer on the inside. I think this is a permanent repair and will never fail.
I beat on the boat really hard and the cracks never grew nor did I feel like the side stay was going to fail.
Drain plug cracks should be ok. Make sure the rudder mounts are not cracked.
Remember the Wave cannot be plastic welded.
You will love the wave in high winds:
https://www.youtube.com/watch?v=SlfXJeVf2bE