I was going to have a different head instead of the Slime for heavy duty use like milling, but while looking around AliExpress for a spindle motor, I had this idea instead where two SecSavr Slimes come together like some micro version of a giant fighting robot. 

Hopefully, the dual magnetic holding power and double sets of motors working together will allow me to skip having to model and test a heavy duty head for the SecSavr and having to install it every time I want to use it. I might be able to do 5 axis milling and since the Slimes would be together, the power limit of the spindle can be doubled to 240W. 

There might also be enough space in this dual sized tool to be able to raise and lower a selection of bits; 2 would already be an improvement but 4 would be even better as it could allow up to 16 different bits to be  installed or switching to another bit if one breaks at the press of a button.

I expected the milling tool and chocolate tool to be larger than the SecSavr Slight, so I can use this concept to know how much depth space would be needed on the Tool Bar. The concept above is 70mm long.

Along with the milling and chocolate tool, this dual tool idea is probably also going to be used for the robotic pancake maker I still want to try. Oh and I just realised that, with 2 Slimes, I could have a 2 in 1 out hotend. I'd really like to get the magic sauce powering the Cetus2, who recently made their nozzle removable: