Yes, I built a ramp for moving my 23" KK up the 8 steps in my house to get the KK from the garage to the deck where it lives now. I used 3/4" plywood. I made support brackets out of 2x2's for the top step, so the ramp was flush with the floor. The ramp itself lay on the steps for support. Because of the steepness/angle, it took 5 of us to push/pull it up the ramp (3 pulling with moving straps and 2 on the bottom pushing). And we took off the lid first to lighten the load. Your KK will be heavier than mine, but you don't have as difficult a ramp to navigate.
Good luck and send pics!