This is from another topic about scale , I still feel the same way .
Just remember the designs was done ,in 2D , by people who "cheat" with colour and pencils on a flat piece of paper. If you ever done a VF1 or VF-19 in 3D , there is no way that the actual "sizes" fit 100% --you have to make them fit within the refence material . Just have a look at the toys and the different ways the manufactureres bend the rule to make the transformations happen .
Have fun , this is not do or die stuff , what you have done already looks great.