I was considering going that route, but then when I looked into scale rigs, I realized that the x trail and axial combo is a long way away from a true scale setup. You will spend a lot more trying to make that actually scale than you would if you just went and bought a trailfinder chassis.
I'm with NCNitro, look around at the used rigs. Just like any other RC, people poor tons of money into these rigs, usually have several, and when they want something new they have to sell one off really cheap. I've been seeing TONS of scalers for sale, because so many guys are trying to buy the slash's right now.
I'm just telling you because I was planning to do a scale build with an x-trail chassis, the end result will be nothing like the bruiser style chassis or even not as scale as the high lift.