add 3d model for Potentiometer_Trimmer-Suntan-TSR-3386P

add 3d model for Potentiometer_Trimmer-Suntan-TSR-3386P in the directory /modules/packages3d/discret/potentiometer.
Which is the length of the pins must be left over of pcb?
I select 0.5mm.
My apologies for my english