Thanks Mike and Frank, the plants are still very small and I expect in a efw years, after some more development, I will get fruit size that are typical of the variety.
I mix pollen, I use whatever is available at the time, from the same plant or from other varieties flowering at the same time. Is this mixing the prefered path or should I use polens from the same plant?
My question on the Pinks Mammoth was to address the possibility that I may have mislabelled but it looks like that will not be resolved by the pictures. I am starting some more rootstock and may, in a year or so put in another Pinks Mammoth and compare the fruits.