My unorthodox grip

I've been using this grip since high school with limited of local success, but was wondering exactly how viable it really is. I'm 27 now, and it feels awkward to swap to a traditional shakehand grip. I feel like I have a firmer grasp on the paddle with this grip, but my backhand suffers. It's hard to get really good topspin on my backhand strokes, and re-positioning my thumb for backhand flicks is sometimes too slow. My forehand shots and slams are excellent with this grip though, but this has led to me overusing the forehand and often finding myself out of position. Thought? Image of grip attached.

Hi Dan,

It depends on what you are aiming for.  If you are wanting to get to a much higher level I think it is worth changing the grip to a more conventional grip.  This will allow you to improve your backhand side, especially your topspin.  It is very difficult to get over the ball with the grip you are currently using.

If you want to just improve a little you can probably do it with the current grip.