Fami Bush For Custom Table

Bush for Fixing Fami Rack on a Custom TableCompatible with ALL Fami Table Rack.I want to use Fami Rack in my custom table and in order to do it I print two different bush. The oval one is used to fix the panel from the rack round holes, the second one is used to fix the panel from the rack square holes. How to Insert Bushes?The oval bush has been designed to remain fixed in the grill hole as represented in the picture below. While the square bush has been designed to fill the space behind the gr