99% of the time, I use one of these 4 infills. I rarely go above 30% infill (50% in Grid) and if I do, I make it 100%. I mounted the Trays on my wall, next to my computer. Seeing the percentage of density on a actual, printed piece before I print is a big help.
Printing the Infills: In your slicer, choose the infill and the percentage you want, with Zero Top & Bottom Layers. Then repeat to fill the tray.
Printing the Trays: Color change at layer 4.20 I included a blank 5 Slot and 7 Slot tray with no text.
Side Note for the Grid Tray having 7 Slots: If you look at the last picture, you'll see the comparison of the Grid and Rectilinear infills. I was surprised to see the Rectilinear infill is 2X denser than the Grid infill, where 10% Rectilinear = 20% Grid......15% Recti = 30% Grid, etc.....(but the Grid does have better layer adhesion.)
The author marked this model as their own original creation.