I recentily installed a pair of Volvo QL Trim System, on my 2006 215cc makes a big difference on my boat. Its very responsive and was easy to install. The best thing about them is the low profile of the trims it doesnt get in the way when your fishing or swimming and they fit snug under the swim ladder, I didnt have to make any modifications to the swim ladder. I found that the bow of my boat would stick way out of the water when I had people sitting at the back of the boat the trims corrected that problem. The trims give me much more control of the boat and more confidence on the water.
http://www.great-water.com/pages/pro...L_Trim_Sys.htm
They only extend about 1 inch. I havent needed to extend them fully to correct any listing or planning as of yet, by accident I once extended one side fully and the boat drastically listed on its side. Its amazing how little amount of trimming the boat needs to react. Another nice feature of these trim tabs is on the control pannel you can see how much you trimmed also worth noting is that as soon as you turn off the ignition the trims automatically retract. They were a great investment especially for a 215cc because of its V-shaped hull, the boat can easily list to one side when you have a cross wind.
They were also chosen by Motor Boating Magazine as one of the top ten boating breakthrough innovations
http://www.motorboating.com/motorboa...152664,00.html