On my test material, slightly higher Rep settings worked. Below is a minor tweak to QTGMC that allows Rep0, Rep1 and Rep2 to go up to 7. Try Rep2 or Rep1 = 6 or 7. Risk of blur elsewhere as described above. However, I found those effects inoffensive in my sample.
QTGMC-3.33
There's a couple of other very minor tweaks in there that I never posted, including a fix for a Bob / TFF / BFF problem noted by ajp_anton some time back.