Teo ... I used the 4120/18 with 5S on the Angel when I first got her, performance on verticals is only so so ... Also, yes you need stand offs of about say 10mm-15mm. Also, the radial mounting pattern is narrower than what was made for the Hacker, dremel out the AXI radial mount a little. Here is a pic of my previous set up. Gonna most probably get another in April ... the yellow one this time.