hey just purchased an rx navara and began looking for a genuine navara hard top or tonneau when i found out that the rx models are suppose to have a different tub. After looking on nissans site and making numerous calls i am still unsure whether the hard covers would fit an rx or not. the dimensions on the site suggest the rx model has a slightly smaller tub so in this case i would think they would. Just after any advice you may have from experience before i take the plunge and buy one. any help would be greatly appreciated. thanks in advance