Is your 600% Dummy13 feeling lonely? Does he need a friend? Why not print him a 600% K9!
Using my same Dummy13 Joints+ system, I remixed TClears Dummy13 K9 model from printables to be printable at larger scales. I printed mine at 600% scale using half Glue and Half Bolt Parts. It used 600g Black Pla and 900g Orange Pla. No joints snapped when I first assembled them however throughout a few failed versions of assembling and disassembling, I noticed the joint did snap slightly. Not enough to see and it did not affect the joint's tension. All the joints are stiff enough to hold up the model's weight.
If you have a makerworld account, show some support and download from there.
Fusion360:
To use these parameters, open the F360 file > go to modify > change parameters.
If you plan to modify the model, drag the timeline marker past the Scale Icon. This will set the model to 100% scale and Show only the main joints.
Parameters:
Assembly:
The author remixed this model.
Modified to print better at larger Sizes.