Why are the blank purple with arrow keys 30 vs the w, a, s, d with arrows 15? I'm guessing they are just harder to find? And I just bought some sprit 62gs for an ergo clear mod but had I seen yours I probably would have gotten the 65g, little worried the 62 will be too light but then again I'm thinking about making my other clears board into tactile greys so maybe I'll just have a heavy and light board.