Hi Peter,
yes it's possible that Cubeitmod reduces the speed, it depends on your settings and the values calculated by Kisslicer.
This is done to make the ratio RPM/ xySpeed constant.
I've decided to do it with "safe" values, that's why the speed is always reduced.
If you want print faster increase the XY speed, knowing that on loops and perimeter the speed will at best match you value or be decreased.
If you think it's necessary I also can change the way Cubeitmod keeps the ratio constant, but you have to be aware that this can result on dramatic speed increase.
for exemple: if the RPM calculated by Kisslicer is 0.15, the Cubex will only understand 0.1 and actually Cubeitmod reduces the xySpeed, if the speed calculated by Kisslicer was 900 Cubeitmod reduces it to 600 to keep the ratio constant ( 0.15/900 = 0.1/600).
If I change Cubeitmod, I can make it increase the RPM to 0.2 and the xyspeed will be increased to 1200, that's 33% faster the the settings and I dont think it's very safe.
As I wasn't confotable with that idea I decided to choose the safe way.