I fully recommend to have controllable trim tabs in any boat longer than 20 feet. I installed a pair of Bennett trim tabs in 06 Horizon 240 and I thought it made a huge difference in rough water condition. It also helps to balance the boat well.
Horizon has a very limited space to install small trim tabs and many Horizon owners say you do not need tabs but I sure liked them for my boat.
When I ordered my new H260, ordered tabs (option for H260) as well.
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08 H260 VP 8.1Gi DP.....Previous
2013 Crownline E6 Merc 8.2MAG BIIIX, DTS/SC