I am going to purchase a gallon of the FK 425 QD and when I called and asked them if I could change some of the samples in their pack, I was told no. Is there a special salesperson I should talk to? Is there an Autopia promotion that allows one to mix and match? I thought I read where someone did this not to long ago. I really wanted to try the sampler but just needed to exchange a couple of items for something else. I am getting the gallon of 425 but I thought it wouldn't have been too difficult to change some samples. I probably would have ordered more things if I like the samples I wanted. Go figure, I thought the customer was king with them, but I guess not.:wall