So I have a 2015 21 SF with a Yammie 115. It is a twin toon with no strakes. When I bought it I thought adding strakes wouldnt be a big deal but finding them and someone who has done it before to weld them has been challenging. I really wanted a tritoon and will eventually get one when the pocket book says I can. The reason I bought this one was I got a great deal and thought I could add the strakes. So my question is who out there has experience with adding an express tube? What kind of performance changes could I see? I really like the pontoon and if I could get the little extra out of it I'd like to keep it a few years. I can do 30 mph with just me in it. I would be content to gain a few more MPH but I more am looking at having less drop off in speed when putting more people on board. And also I know it will handle better in rough water too. So any input would be greatly appreciated. Also i am a Newbie and love the Benny and am looking forward to when I can get the next one!