For anybody who has a 3D slicer program, I have attached a STL file of the jigsaw puzzle technique of connecting parts together in 3D printing
This example is a irregular shaped lid for a 150 mm dia milling circular table box.
The box was 200 mmm deep.
If you slicer programme is able to move the 4 parts individually then you will see that they all join up precisely.
The 4 parts were designed to become a "snap fit" together with a small amount of super glue on the straight edges.
My 3D printer has a max table of print area of 190 mm x 190 mm.
Hope of interest, any questions then please ask.
Please see photos in the file section.
Thanks
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John
John Lindo