Parametric grid, any size, rectangular, round or elliptical. To make it elliptical, just make it round then use scale to size it...

I created these links where you can find all common filaments and spare parts at the best prices. These are just links to selected eBay and Aliexpress items, where I normally buy spare parts and materials for my printer, prices are excellent and products are good. If you buy something from here you will support me a little bit to make these projects.

1Kg PLA Filament - eBay