How short is the throw on the Garagistic Supreme Short Shifter?

How short is the throw on the Garagistic Supreme Short Shifter? - E30, E36, E46

Here is a visual on how short the throw can be on the Garagistic Supreme Short Shifter. The throw will vary case by case depending on your chassis and worn components related to the shifter. 

Is the Supreme Short Shifter adjustable?

Yes the Supreme Shifter is adjustable simply with two set screws on opposite side of  the DSSR connector.