This set includes all of the white colored insert pieces required to make the following puzzles:

• CrossCode Burr #1
• CrossCode Burr #2
• CrossCode Burr #3
• CrossCode Burr #4

This kit comes with one set of body pieces preinstalled with the CrossCode Burr #1 inserts, and preassembled so that you get a chance to do one as a disassembly puzzle rather than an assembly puzzle.

Whereas the GreenCode Burr Master Set gives you 4 variations while keeping 75% of the green pieces the same (small bag of extra parts) the members of this CrossCode family don't share any noteworty pieces beyond the most basic double-pin ones, thus this Master Set comes with larger bags of extra parts.

If you want to spend more: I sell "display upgrade kits" of white insert pieces that contain the 5 ones which are the same between each variation, so that you can have multiple variations assembled simultaneously. You'll need to have an extra sets of body pieces too.

If you want to spend less: I sell this set of white insert pieces as a standalone upgrade kit that does not include any body pieces in case you already have enough of those and don't mind recycling components from one to the next as you try each member of the Barcode Burr family.

If you want to maxx-out your display shelf: This master set + 3 display upgrade kits + 3 sets of body pieces will let you have all four CrossCode Burr variations assembled at once. Honestly though, if you want to go this route then you might as well just buy all four of the individual preassembled from me so that you get to experience them all as blind disassembly challenges as your first experience of them!