Duplo base 15 x 18 with 5 stud wide road

I made a bigger base which fits nicely on a 30 x 30 cm printers build plate.

The base thickness is 1.5 mm so 5 solid layers with 0.25 height.

Reference measures are from here https://www.thingiverse.com/thing:615256

Designed in Fusion 360.

Update: Added also full stud version( no road)

Before printing, this big plate consider making a test print of this https://www.thingiverse.com/thing:2427615 for making slicer adjustments. To get a nice fit of a brick I play with extrusion mul