This model has a lower height for the wheels not to hot the drawer, and has only 1 rails so you don't have to disassemble the bed belt and wheel, u only have to remove the screws for the drawer to fit in place.
1- take off the screen screws and remove the screen ![]()
2- Take off screws holding the bed wheel, REMOVE THE SCREWS TO THE DRAWER SIDE ONLY NOT BOTH SIDES, AND DO NOT REMOVE THE T-NUTS INSIDE THE FRAME OF THE BED.

3- Slide the drawer in place inside the rails of the LCD screen.
4- Reassemble.
The author remixed this model.
Improved measurements so the wheel will not hit the drawer, thus requiring no disassembly for the bed.
improved handles that look better :)