I just spent the last 6 hours trying to do my dual battery setup. I took the stock battery out, cut part of the fan shrown of the radiator, and cut a part of the fuse box to make room for the coumbia overland dual battery tray. I finally got the batteries to fit (a stock toyota battery and an oddessy) and I couldnt get the hold down for the battery tray to fit. It is so frustrating. I spent HOURS on this and vut up my 4runner. I said screw it and tried to reconnect the main battery to the truck but the factory wires wouldn't reach so I had to take the whole setup out and reinstall the factory tray and battery. I spent 6 hours, a trip to lowes, a trip to autozone on this project. I am also $1,000 down the hole in parts. So frustrating. I have to rant somewhere, right?

Did you do some research on here before you started?

More than enough. I read everything I possible could. My biggest hurdle is mouting these batteries with this tray. Nobody gave a good how-to on that.