how to draw this object

hello guys

my name's Stefano and i work with solidworks by 2006.

Today i use Solidworks 2015

I have 2 question for you

1-What is the easiest system to draw this model? ( I want to create a system to redraw with different sizes)

2-What is the easiest system to draw mold for this part?

thanks for your help

SolidworksPlastics And Mold Design