sorry if this doesn't translate well, i am from Australia and i have tried to print your sled on 3d hubs however it appears to not work. i have included the message from the guy who was doing the printing for me. if you are able to shed any light on my situation i would appreciate it :) . i just used PLA and 200 μm for the height?
The parts are printed but the quality is not good. The thread is warped because of how small they are and the overhang in the slots are distorted as it is not possible to put supports in there.
It is possible that a 0.1mm layer height may help but I think a material like ABS might be a better fit for these parts.
I can print them on another printer with ABS but if they turn out okay I will need to charge an additional fee, as these are design issues."