In the above SOP are the basics for how a few of us like to CRC ethanol extractions. If you are extracting at -60C, you should not need to CRC your tincture. I am guessing there is something slightly off in your SPD protocols. Last place I was with, I extracted at -45 to -50C with no CRC before short path. Gave me beautiful results on a crappy Chinese 2L system every time.