One thing that comes through is your passion for what you do, the challenge is the driving force, I have this passion too when developing new tooling for my pipe production.
I'm only using 2D Auto C.A.D. but that is more than sufficient for what I need.
For example, I spent over 250 hours drawing up and developing a press tool to press one particular component, it evolved as I was drawing.
I purchased the material then spent about 60 hours machining components.
The amazing thing is/was .... the very first item out of the tool was 100% perfect, I'll have to admit I was surprised, developement never goes "that well" !