Ford Focus ecoboost 1.0 crankshaft pulley install (timing change)

Hello I plan to change timing in Ford Focus ecoboost 1.0 2013.

To be honest I don't want to buy a 5:1 torque multiplier (it's expensive), and I have some engineering question:

Procedure for mounting the crankshaft pulley is as below:

Normall torque wrench

1. Torque:
   Stage 1: 25 Nm
   Stage 2: 70 Nm
   

Torque multipler 

1. Torque: 60 Nm - that means 300 Nm with normal torque wrench (5x60 Nm)
   

          Stage 1: 90°
          Stage 2: 90°
          Stage 3: 90°
          Stage 4: 90°
          Stage 5: 90°



What degree I need to tighten the bolt without using the multiplier ?

So if we have ratio 5:1 of torque that means the diameters of the gears are 5:1 as example 10 to 2
Perimeter of first gear are 3,14*1^2= 3,14...
and of the second gear are 3,14*5^2= 78.54....
The ratio of perimeter =1/25
The sum of 5 stages is 5*90= 450 degree

I think the degree that I must rotate the bolt exactly 18 degree (1/25*450).

What do you thing?