So much for making progress on the mitts. I ended up going back about 30 rows because I noticed I had made a mistake on the palm side.
My new yarn base arrived today and I am thrilled with it. It's a 80% superwash merino & 20% nylon base but it has a nice cabled twist which is like the Cherry Tree Hill Supersock Select base that I stock. The new base is wonderfully soft. I dyed 2 skeins of my Two-Lips colourway on it today just to try it out and I think I'm smitten:
I will have more new colours to put in the shop over the next few days :-)