As I have got the question several times, if it is possible not to use A2173F/R.

Here is a little explanation.

Please do not use without!
The center of the ball with using A2173F/R is equal to the center of the ball that was used in MTC2R with 0,5mm below. As a side note, 0,5mm was the very minimum ever used in MTC2R.
Likewise, the position of the center point is not the same as the position of the roll center.