I've been thinking of changing my starting spot and mark. Here's some information of what I have going on.

I got a new ball, a 15 lbs. Storm Frantic. I've been throwing it usually between 15.5mph and 16mph. I normally start on the 12th board from the right and adjust based on lane conditions. I used to aim at the 2nd arrow but I had to move that to the 1st arrow because my ball was moving over and consistently hitting the wrong side. I hit the pocket more, but I'm having trouble being consistent hitting the pocket. Last week I was coming up short, but I think that's because my thumb hole was too small and my thumb wasn't coming out early enough. Getting that fixed tomorrow. When I do hit the pocket, I tend to leave a lot of ten pins. I was thinking of an approach starting further left and aim for a mark further left. I just need an idea of what would be a good starting point to work from. Then I can adjust my starting point from there.