how to scale automatically the drawing views for an existing model and drawing where dimensions revised in a specified sheet format

let us consider a part with dimensions ID, OD, & thickness of Ø7, Ø32 & 3mm respectively. now i had created drawing for it in A4 sheet format in 2:1 scale for clear visiability; if i change the above dimensions as Ø10, Ø40 & 5 mm then the rebuild drawing the views will be enlarged so i need to reduce scale for previous view visiability for that i need to reduce the scale to 1.5:1 or so its just approx value

can any one help me to automate adjusting the scale for all the Base views to the ref drawing taken.