I've got the extra trim tabs on my V237. I like them a lot for simulating having weight up front, and because they let me rip off to another spot without draining weight (lets you make the boat level).
However, I've found those extra tabs will only act to decrease the height of your wave, or even wash it out if you don't have it set right. What they do really well is lengthen the pocket of your wave. Keep in mind though, that the same results could be achieve with bags up front; tabs are just much much easier.
I remember reading a post by someone comparing the V237 wave of one with the tabs and one without them. They thought the one with the tabs could not make as good a wave as the one without them. I'm not really convinced of this, as I've demo'd 237s with and without, but it may be something worth keeping in mind. I'll know more as I get onto my boat this summer and really dial it in.
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