Lining up channels in Mix view

I am working on a dedicated macro keyboard for Protools and have come up with a way to control the scroll bars to move around in mix view so that the channels are always lined up perfectly against the left side of the screen. The problem is that the tricks I am doing to control the scroll bar require a fixed number of tracks. For example, using multiples of 20 tracks visible at all times. This works great but I want to find a better way to do this that does not require a set number of tracks visible. Anyone got any ideas on how to navigate around in mix view to keep channels aligned? In edit, you can click up or down and the channels always "snap" perfectly. I am not sure why this is not the case in mix. I tried writing some code that allows me to bank up or down using HUI protocol, but this does not work either. I am open to some method that uses a protocol as my app can send commands as needed.



Thanks for any suggestions.