I've always heard that oil canning is not a significant issue as when you sit in the boat on the water, the oil can is popped out anyhow. I've never gotten underneath one to know for sure, but it would be an interesting thing to do in the pool. If your boat is cracking, its probably more than the oil can thats the problem, IMO. Let us know if Wave Sport covers your Transformer.
My Big EZ has displayed oil canning for the last 3 seasons, and the boat has taken a serious beating, but no cracks.