HelloShaun,
the first problem is the sketch tool. I asked Michael a while ago for that and I tried to program it in js for Moi already - without a really good result. I have also made some primitive gestures and projection methods like that in - I love Sketch- a project from the same source (also have a look for true2form) . It is a lot of stuff that these guys create and completly different to other workflows and concepts. In my opinion - difficult.

Have a nice day
Karsten