Well, everyone has their weaknesses. And I'm pretty sure that multi-tonguing is mine (unless I have an epiphany and things just start coming together). So some days my tonguing is good, actually quite good, and I'll get some confidence. Then the next day I'll come back and won't even be able to get though the first exercise on page 175 of the Arban's book decently . I just started "actually" doing exercises, I changed teachers and he is often considered the best around here, but even with the great instruction I am afraid that I shall be forever doomed to double tongue slowly. One of the problems I think is my K-tongue is too hard, if that gives any insight. So my question is, has anyone ever struggled with double tonguing? And if so, how are you at it now and what did you do to get there?