Hi,
i recently got myself a CTC Bizer with a dual extruder. I use Sailfish 7.7 as Firmware. From start on I'm not able to get round circles or the correct size in X-direction. I printed multiple cubes using different Slicers: ReplicatorG, Makerware, S3D and Slic3r - same Problem. My y related measurements are within the error range of my caliper, z is pretty close and x is too short by 5 to 6%

A 20x20x10 cube is about 18.52x20x10.03, a circle is getting flat parallel to the y-axis (undersized radius in x direction).

I tried different filaments: same result.
I checked for wobble: everything is stiff
Slicers: same resault
I print abs in a full enclosure, no problems with shrinkage at all.
I reviewed the few pieces i made with the original firmware, same Problem but these parts were too organic or too small to get exact values.
Dimensions stay consistent over 50+- layers.

When i did the firmware update i used the Flashforge machine settings in ReplicatorG, i flashed the firmware again with the Replicator Dual selected - same problem.

Has anyone a idea how i could solve this Problem?