"Impossible" Bridging Technique - Print and Flip

Print the central and upper shelves first, then the main part with pause points at 34.5mm and 37.5mm (pause just before the shelf begins printing). As it reaches these points, insert the shelves into the ledges. The printer will then print over top, fusing them in place and creating otherwise impossible geometry for support-free printing.

Printed in transparent PLA with 0.8mm external perimeters (0.5mm elsewhere) and 0.3mm layer heights on a 0.4mm nozzle. Should work with most settings.