This is a replacement tray for those tilt-out trays that are in front of a sink.
You may want to remix the “Middle” to get the desired size for your needs. As designed, this provides for a 308mm (12-1/8 inch) hole-to-hole spacing.
No supports should be needed (the model includes the supports).
2023-07-03: Major rework to simplify the model. There are now only three parts to print. You now only need to remix (resize) the “Middle” to adjust to your specific needs.
The author marked this model as their own original creation.