3W middle support for 1w and 2w drawers above

This model has been remixed from Jerrari3D's amazing 270 Table Top Kit V2 to allow it to be used for structural support above a 270 3W drawer for the use of three 1w or a 2w and a 1w above. 

Allows for the screw from the footrails to be used to hold the drawers above in place.

Has not been tested however the holes are an exact alignment

Modified the combination of the 2W and 1W lower rail and lower cover to allow it to be used as a structural support for smaller width drawers on top on a 3w drawer.