Unfortunately, I don't have a 10-foot-wide monitor to allow me to look at your Block Diagram. Do you know about sub-VIs? This lets you "hide" large block diagrams inside a 32x32 pixel square, saving a lot of Block Diagram Real Estate. Good LabVIEW Style keeps everything in your VI within a single (laptop) screen, say 1280 x 1024 pixels.
It is the rare VI that requires Tab Panels, and they are usually ones where there is a real (or, more often, only "perceived") need for extra Controls or Indicators. You've shown an almost blank Front Panel -- you almost certainly do not need a Tab Control, and I was unable to study your impossibly-large Block Diagram sufficiently to figure out a compelling reason (from your code) for one.
It is generally a better idea to Start Simple and Make It More Complex when Necessary than to put all the Bells and Whistles in at the beginning, "just because I might need to tweak this parameter". I've seen some extremely messy and difficult-to-debug Block Diagrams arise this way.
Bob Schor