I had a problem with my oven shelf sagging under excess weight. To fix this, I quickly made some support legs using scrap wood I had at home and added some skirting below the leg for extra strength. I didn't need to glue or drill anything because the weight itself keeps it stable.

I printed the legs with 40% infill, but I think it can be lowered.

P.S. This is my first design and upload with my new X1C, and I'm amazed at how quickly and accurately I can go from idea to product!