Looking to get a fish shape similar to a Christenson fish and wondering how to size it. The new Christensons I have seen feel wide and super thick even though the dims are 21 1/4 x 2 1/2. Wondering how much smaller I could ride them compared to my DD or do you try to keep them around the same liters as your DD? I assume this has been discussed but I searched the forums and couldn't find anything on point. Thanks in advance for any feedback!