Re: Larsons and trim tabs.
I posed the installation question (re: installing SmartTabs on a Larson's contoured transom) to Nauticus, and Greg (a Nauticus technician) replied: "The tabs will work on your boat and I have attached some examples of the installation. They aren’t you exact boat but the same idea. They can mount on a contour area the actuators just need to be angled enough into the boat so that it can compress. Take a look and let me know your thoughts."
The pics sent by Greg (one is a Searay, the other a Bayliner):

I installed them on my boat and they work fine. (I'd post a pic of the installation on my Larson, but I removed the SmartTabs while I'm rebuilding the transom.)
Jim