cal with ~5kg alu blok

F1=NW  5.6 -1.3
F2=MNW 5.0 -0.8
F3=MZW 5.2 -0.9
F4=ZW  5.4 -1.2
F5=NE  5.6 -1.4
F6=MNE 4.8 -0.7
F7=MZE 5.5 -1.3
F8=ZE  3.1 -0.4