Calling susp geometry experts; Toying with front spacers. Ruin optimal scrub radius?

[TurnAround]

I added H&R 25mm DRA spacers to the rear of my '02 X last year. Awesome look. Adding rear spacers and doing nothing to the fronts will add some oversteer (not desirable). In the case of the X, while this rule may be true, it never the less made the car handle flatter (more fun).

Now I'm considering moving the 25mm spacers to the front and buying 30mm DRA spacers for the rear. 25mm sounds like a lot, but I have 19" wheels (10.5 inches wide). Looks wise, I think the X can easily handle that. The 30mm on the rear, I know will look dynamite.

Here's the potential issue though; Increased positive Scrub Radius. Read this H&R article.

Scrub Radius | Technical || H&R Special Springs, LP

I sort of instinctively knew what adding spacers to the front would do, but this article really explains it well. Given the size of our wheels, 25mm at the hub could translate to a lot of added positive scrub radius. This could potentially make the steering sluggish and hard and 'dull' the immediate responsiveness 'turn in'. It kind of depends on one thing, and this is where I need your help. I don't know where the factory OEM scrub radius is at?? The article says that mcpherson strut sytesms (most all BMWs) really like negative SAI (scrub radius). Pushing the wheels out will be going in the direction they don't like. But if maybe BMW designed the cars with substantial negative SAI to start with. Then adding some wheel spacers might take the tires to neutral SAI, and the steering response and tire wear would still be good.

Besides looks, the upside to front spacers is way less understeer and the car will handle even flatter.

I know the easy answer.. "BMW got it right the first time. Leave it be". But, there are things BMW did for "average joe" reasons, and can be tweaked with great performance results. Maybe this is one of them.

Does anyone know what our scrub radius number is?

Anybody had any experience with this mode and an assessment of the effects on steering feel and responsiveness?

Thanks!