Horton

[tools4fools]

you will see that very little 'NEW' weight was added ahead of the cg

Disagree. Think logic.

If the engine would have mounted same way as the BMW, then it would have added 160kg in front of CoG.
It needs to be moved backward and have weight in the back, ohterwise you gonna have a shift in CoG forward. So some weight will have to be added in the back. Perfect balance, no need for anything else.
Not a single source supports your claim anyway.

Radinger and Schick, page 18

March 21, 1940, ...., and swept back outer wings for a shift of CoG due to heavy jet engines....

Before it ever had engines on the wing.

It mentions elsewhere, later in the development, that there was a problem with airflow over the inner wing and hence the sweep was continued.

About the V3, which got this inner sweep first:

this aircraft role in the test program was mainly high-speed trials and aerodynamic investigations (pressure deistribution, the influence of Mach number, etc)