robotic mower RL2000 knife holder (rl2000 messerhalter)

knife holder for my robotic lawn mower .
this is the first version.

known issues:
to much filament used
holders are breaking off

today 18.04.2018 testrun of V1 with broken holder
first run was ok

V2
changed to print it in two parts
you have to print the second part 90 degree rotated with 40 %
i added a second pair of mountig holes, if you mess up one you can use the others
test fails with ripped off screws...have to design a screw protector
this would normally not happen on gra