Toy Crane stable base

A popular toy construction set (https://www.amazon.ca/Construction-Vehicles-Engineering-Excavator-Interchangeable/dp/B08DCMYFHW/) came with a terrible base. It was far too light, and the only thing holding it was suppose to be a suction cup, which also didn't work.

This model on the left, original base on the right. The slot fit for the crane is very tight (20.3mm x 20.4mm).

This replacement base is significantly wider, and has spaces inside for extra weights. I used 20mm x 5.2mm M6 flat nuts. But you can also use pennies. 

The space in the arms are 6mm deep, so I put in 1 M6 flat nut, there is enough space for 3 pennies.

The center space is 12mm deep. I put in 2x M6 flat nuts. 

I printed at 0.2mm layer height, 4 walls, and 50% infill, for a total printed weight of 152g. That and the 6x M5 flat nuts gives a total weight of 204g, in addition to the added width of the base, makes the crane incredibly stable now.

The extra weights (the flat nuts or whatever you want to use), need to be added during print. So you you'll need to add pauses at 10mm and at 14mm.