Hello,   I am trying to configure a slider (using quantity) on the type of configurable option.   For example, I am trying to configure a slider for RAM. I want folks to be able to increase (or decrease) by 512 MB at a time. I've set the min and max on the configuration option but I cannot seem to make it work in blocks of 512, it only wants to go up or down by increments of 1.   Is anyone familiar with how to do this?