I have 2 of the 997's. I would buy the biggest ram mount you can afford. I bought the one recommended by Cabelas when i bought my first unit. These are heavy units and if you skimp on the mount it will not hold it up while traveling or in any wind. In my opinion do not skimp on the ram mount size or you will be un happy later.You will find you really need to crank that handle down tight or the unit falls forward and pulls on the cords or pulls them out.Hope that helps.