If there is carry down, that means some oil. I like to stay with the stronger ball if I can, balling down may make the weak ball puke.
When you say you are standing 40, make sure you are ending up at 40 too. I know from experience that you can end up walking towards your target and ending up at 32. You just gave away 8 boards.
Try moving your target down the lane. Like to 45 feet down the lane, this will help you to project the ball and not get as much on it, not as much early revs. This will help you to stay with the stronger ball.
Try getting in front of the ball return on the right lane. It can be done. You may have to learn 3 steps approach, but you can do it. C'mon Bouche' you can do eeat!!
Oh yeah, the Lane #1 Bullet was one of the longest, straightest balls I ever owned, wish I hadn't got rid of that ball. If you can find one, sometimes used on Ebay.
MikeA