This device is to hold the heater blocks in place while changing nozzles. Many instructions say to use pliers, but that is very hit-and-miss. Using this, the heater blocks are clamped against each other which stops them from being able to be rotated. It simplifies the process immensely.
I don't claim any innovation in this - I've seen similar ideas already, but couldn't find anything which fits the Creator Pro properly. Certainly this fits like a glove on my 2016 CP.
I am very much an enthusiastic amateur when it comes to designing. My designs tend to have two things in common
1) They serve a purpose. I like to design functional objects which have a real-world use. 3D printing for art is fine, but it's its real-world application which will take the technology forward
2) Wherever possible I design to be easy to print and try to eschew supports or complex printing; modifying the design where necessary and possible to achieve this.