My Truth has a 31 inch axle-to-axle length and the string angle means its further from my eye. I also shoot a Hogg It sight and not only drilled out my 1/4 inch sight to "As Big As Was Safe" but also added two inches in sight bar length (8 now).
I still have to make sure I can see the entire sight housing during the building of my "picture".
Size...whatever works!