I'll give you a vote of confidence. What you do is very advantageous, and especially for yourself. There's no one grip that fits every situation. One just has to figure out what suits him the most, and looks like you did, naturally.
Btw, I do the same thing. I wait with my sw grip and the other hand somewhat on top of it (ready for BH as well). This is best for me because I'll be hitting FH most of time.