I tried this and it turned out to be a disaster, I wanted to put two 10s in the 60 side and still be able to flip the 40 side down to slide gear in. Those that know me will tell you that I am more than handy and my fabrication skills are better than most. I would have done this had it not turned into nothing but a headache. Once you split the gate it wants to lean into the cab on top inner corners, since there are only two hinges, so it is very difficult to get to seal, unless you were to add additional hinges or locking mechanisms, secondly, once you add any sort of effective weather strip to the center of the two sections, it essentially renders one side of the split gate useless, as the strip needs to overlap the other gate to get a good seal, so if you put it on the 40 side, you always have to flip the 40 down first, or flip both gates. Trying to put only the 60 down tears up the seals (I tried 4 different methods and types of weatherstripping). In addition to these two major issues, there were more than enough minor ones, the spring loaded flap mounted in the bed that comes down and covers the gap between bed and cab needs to be spilt as well, finishing the center edges so they don't look like crap, establishing and maintaining the original rigidity of the gate once it is split, and some others I don't quite remember. I ended up scrapping the whole idea and just building a new midgate out of two layers of MDF, bolting a box for two 12's to it, adding a combo vinyl/carpet front and carpeting the rear and called it a lost cause, leaving me with a worthless gate and about $60 out of my pocket in additon to the countless hours of misery while working on it., O yeah, not to mention the lack of a properly functioning midgate during the 3 weeks of failed "splitting" and the two weeks without one completely while spending more $$ fabricating a new one. My advice, get this idea out of your head as quickly as possible and save yourself some misery.