That's why you map and record the backspin amount. I tried the apex adjustment in an earlier program but went back to mapped club data. The program is really a club inventory program. It will give you the estimate distance to the flag based on wind , wind direction, flag, and elevation input. It's up to you to pick the right club and backspin out of your mapped clubs to get the best results. The more records of different back spin logged for a club, the better you will be.
Back spin ticks can be tricky because the longer you hold down on the mouse for clicks the downward dot movement will speed up. I'm working on an update that will display the green dot on the ball based on backspin % when you map the shot. Then later when using the program , the ball image will appear for that mapped backspin.
I will have some predetermined back spin dot placements images to help you judge the amount..
I will have this in another program called MAPPER which is only for logging in your mapped clubs.
You can use number of ticks (mouse clicks) for backspin instead of percentages. Either way will be up to you.
I will have a video on this shortly,